- By Disease
- Complementary & Alternative Medicine
- Clinical Trials
- Screening & Detection
- Supportive Care
Unusual Cancers of Childhood Treatment (PDQ®)
- General Information About Unusual Cancers of Childhood
- Head and Neck Cancers
- Thoracic Cancers
- Abdominal Cancers
- Genital/Urinary Tumors
- Other Rare Childhood Cancers
- Changes to This Summary (04/04/2013)
- About This PDQ Summary
- Get More Information From NCI
General Information About Unusual Cancers of Childhood
Fortunately, cancer in children and adolescents is rare, although the overall incidence of childhood cancer has been slowly increasing since 1975. Children and adolescents with cancer should be referred to medical centers that have a multidisciplinary team of cancer specialists with experience treating the cancers that occur during childhood and adolescence. This multidisciplinary team approach incorporates the skills of the primary care physician, pediatric surgical subspecialists, radiation oncologists, pediatric medical oncologists/hematologists, rehabilitation specialists, pediatric nurse specialists, social workers, and others to ensure that children receive treatment, supportive care, and rehabilitation that will achieve optimal survival and quality of life. (Refer to the PDQ Supportive and Palliative Care summaries for specific information about supportive care for children and adolescents with cancer.)
Guidelines for pediatric cancer centers and their role in the treatment of pediatric patients with cancer have been outlined by the American Academy of Pediatrics. At these pediatric cancer centers, clinical trials are available for most types of cancer that occur in children and adolescents, and the opportunity to participate in these trials is offered to most patients/families. Clinical trials for children and adolescents diagnosed with cancer are generally designed to compare potentially better therapy with therapy that is currently accepted as standard. Most of the progress made in identifying curative therapy for childhood cancers has been achieved through clinical trials. Information about ongoing clinical trials is available from the NCI Web site.
Dramatic improvements in survival have been achieved for children and adolescents with cancer. Between 1975 and 2002, childhood cancer mortality has decreased by more than 50%. Childhood and adolescent cancer survivors require close follow-up because cancer therapy side effects may persist or develop months or years after treatment. (Refer to the PDQ summary on Late Effects of Treatment for Childhood Cancer for specific information about the incidence, type, and monitoring of late effects in childhood and adolescent cancer survivors.)
Childhood cancer is a rare disease with less than 13,000 cases diagnosed before the age of 20 years each year in the United States. The Rare Disease Act of 2002 defines a rare disease as one that affects populations smaller than 200,000 persons in the United States and thus, by definition, all pediatric cancers would be considered rare. The designation of a pediatric rare tumor is not uniform; for example, the Italian cooperative project on rare pediatric tumors (Tumori Rari in Eta Pediatrica [TREP]) defines a pediatric rare tumor as one with an incidence of less than two per 1 million population per year and is not the subject of specific clinical trials. Yet, this definition excludes common histologic subtypes such as melanoma and thyroid carcinoma, both of which have an incidence rate in excess of five per 1 million per year.
Most diagnoses included in this summary of rare cancers are in the subset of malignancies listed in the International Classification of Childhood Cancer (ICCC) subgroup XI, including thyroid cancer, melanoma and nonmelanoma skin cancers, in addition to multiple types of carcinomas (e.g., adrenocortical carcinoma, nasopharyngeal carcinoma, and most adult-type carcinomas such as breast cancer, colorectal cancer, etc.). These diagnoses account for about 4% of cancers diagnosed in children aged 0 to 14 years, compared with about 20% of cancers diagnosed for adolescents aged 15 to 19 years (see Figure 1). The majority of cancers within subgroup XI are either melanomas or thyroid cancer, with the remaining subgroup XI cancer types accounting for only 1.3% of cancers in children aged 0 to 14 years and 5.3% of cancers within adolescents aged 15 to 19 years. The very low incidence of patients with any individual diagnosis, and their age distribution, makes these rare cancers extremely challenging to study.
Several initiatives to study rare pediatric cancers have been developed by the Children's Oncology Group (COG) and international groups. The Gesellschaft für Pädiatrische Onkologie und Hämatologie (GPOH) rare tumor project was founded in Germany in 2006. The TREP project was launched in Italy in 2000, and the Polish Pediatric Rare Tumor Study Group was launched in 2002. Within the COG, efforts have concentrated on increasing accrual to the COG registry and the rare tumor bank and developing single-arm clinical trials and increasing cooperation with adult cooperative group trials. The accomplishments and challenges of this initiative are described in detail.
The tumors discussed in this summary are very diverse; they are arranged in descending anatomic order, from infrequent tumors of the head and neck to rare tumors of the urogenital tract and skin. All of these cancers are rare enough that most pediatric hospitals might see less than a handful of some histologies in several years. The majority of the histologies described here occur more frequently in adults. Information about these tumors may also be found in sources relevant to adults with cancer.1Smith MA, Seibel NL, Altekruse SF, et al.: Outcomes for children and adolescents with cancer: challenges for the twenty-first century. J Clin Oncol 28 (15): 2625-34, 2010.2Guidelines for the pediatric cancer center and role of such centers in diagnosis and treatment. American Academy of Pediatrics Section Statement Section on Hematology/Oncology. Pediatrics 99 (1): 139-41, 1997.3Ries LA, Smith MA, Gurney JG, et al., eds.: Cancer incidence and survival among children and adolescents: United States SEER Program 1975-1995. Bethesda, Md: National Cancer Institute, SEER Program, 1999. NIH Pub.No. 99-4649. Also available online. Last accessed March 28, 2013.4Ferrari A, Bisogno G, De Salvo GL, et al.: The challenge of very rare tumours in childhood: the Italian TREP project. Eur J Cancer 43 (4): 654-9, 2007.5Howlader N, Noone AM, Krapcho M, et al., eds.: Childhood cancer by the ICCC. In: Howlader N, Noone AM, Krapcho M, et al., eds.: SEER Cancer Statistics Review, 1975-2009 (Vintage 2009 Populations). Bethesda, Md: National Cancer Institute, 2012, Section 29. Also available online. Last accessed March 28, 2013.6Brecht IB, Graf N, Schweinitz D, et al.: Networking for children and adolescents with very rare tumors: foundation of the GPOH Pediatric Rare Tumor Group. Klin Padiatr 221 (3): 181-5, 2009 May-Jun.7Balcerska A, Godziński J, Bień E, et al.: [Rare tumours--are they really rare in the Polish children population?]. Przegl Lek 61 (Suppl 2): 57-61, 2004.8Pappo AS, Krailo M, Chen Z, et al.: Infrequent tumor initiative of the Children's Oncology Group: initial lessons learned and their impact on future plans. J Clin Oncol 28 (33): 5011-6, 2010.
Head and Neck Cancers
Childhood sarcomas often occur in the head and neck area and they are described in other sections. Unusual pediatric head and neck cancers include nasopharyngeal carcinoma, esthesioneuroblastoma, thyroid tumors, oral cancer, salivary gland cancer, laryngeal carcinoma, papillomatosis, and respiratory tract carcinoma involving the NUT gene on chromosome 15. The prognosis, diagnosis, classification, and treatment of these head and neck cancers are discussed below. It must be emphasized that these cancers are seen very infrequently in patients younger than 15 years, and most of the evidence is derived from case series.
Nasopharyngeal carcinoma arises in the lining of the nasal cavity and pharynx. This tumor accounts for about one-third of all cancers of the upper airways. Nasopharyngeal carcinoma is very uncommon in children younger than 10 years but increases in incidence to 0.8 and 1.3 per 1 million per year in children aged 10 to 14 years and in children aged 15 to 19 years, respectively. The incidence of nasopharyngeal carcinoma is characterized by racial and geographic variations, with an endemic distribution among well-defined ethnic groups, such as inhabitants of some areas in North Africa and Southeast Asia. In the United States, nasopharyngeal carcinoma is overrepresented in black children when compared with other malignancies.
Nasopharyngeal carcinoma is strongly associated with Epstein-Barr virus (EBV) infection. In addition to the serological evidence of infection, EBV DNA is present as a monoclonal episome in the nasopharyngeal carcinoma cells, and tumor cells can have EBV antigens on their cell surface. The circulating levels of EBV DNA, and serologic documentation of EBV infection, may aid in the diagnosis.
Three histologic subtypes of nasopharyngeal carcinoma are recognized by the World Health Organization (WHO). Type 1 is squamous cell carcinoma; type 2 is nonkeratinizing squamous cell carcinoma; and type 3 is undifferentiated carcinoma. Children with nasopharyngeal carcinoma are more likely to have WHO type 2 or type 3 disease.
Nasopharyngeal carcinoma commonly presents as nosebleeds, nasal congestion and obstruction, or otitis media. Given the rich lymphatic drainage of the nasopharynx, bilateral cervical lymphadenopathies are often the first sign of disease. The tumor spreads locally to adjacent areas of the oropharynx and may invade the skull base, resulting in cranial nerve palsy or difficulty with movements of the jaw (trismus). Distant metastatic sites may include the bones, lungs, and liver.
Diagnostic tests should determine the extent of the primary tumor and whether there are metastases. Visualization of the nasopharynx by an ear-nose-throat specialist using nasal endoscopy, examination by a neurologist, and magnetic resonance imaging of the head and neck can be used to determine the extent of the primary tumor. A diagnosis can be made from a biopsy of the primary tumor or of enlarged lymph nodes of the neck. Nasopharyngeal carcinomas must be distinguished from all other cancers that can present with enlarged lymph nodes and from other types of cancer in the head and neck area. Thus, diseases such as thyroid cancer, rhabdomyosarcoma, non-Hodgkin lymphoma, Hodgkin lymphoma, and Burkitt lymphoma must be considered, as should benign conditions such as nasal angiofibroma, which usually presents with epistaxis in adolescent males, and infectious lymphadenitis. Evaluation of the chest and abdomen by computed tomography and bone scan should also be performed to determine whether there is metastatic disease.
Tumor staging is performed utilizing the tumor-node-metastasis classification system of the American Joint Committee on Cancer (AJCC). The majority (>90%) of children and adolescents with nasopharyngeal carcinoma present with advanced disease (stage III/IV or T3/T4). Metastatic disease at diagnosis is uncommon (stage IVC). A retrospective analysis of data from the Surveillance Epidemiology and End Results (SEER) program reported that patients younger than 20 years had a higher incidence of advanced-stage disease than did older patients, higher risk of developing a second malignancy, and a superior outcome after controlling for stage.
The overall survival of children and adolescents with nasopharyngeal carcinoma has improved over the last four decades; with state-of-the-art multimodal treatment, 5-year survival rates are in excess of 80%. However, the intensive use of chemotherapy and radiation therapy results in significant acute and long-term morbidities.
Treatment of nasopharyngeal carcinoma is multimodal:
- Combined-modality therapy with chemotherapy and radiation: High-dose radiation therapy alone has had a role in the management of low-stage nasopharyngeal carcinoma, but studies in both children and adults show that combined modality therapy with chemotherapy and radiation is the most effective way to treat nasopharyngeal carcinoma.Many randomized studies have investigated the role of chemotherapy in the treatment of adult nasopharyngeal carcinoma. In a meta-analysis of ten randomized studies and 2,450 patients, the use of concomitant chemoradiation therapy was associated with a significant survival benefit, including improved locoregional disease control and reduction in distant metastases. Neoadjuvant chemotherapy resulted in a significant reduction in locoregional recurrence only, while postradiation chemotherapy did not offer any benefit.In children, four studies utilizing preradiation chemotherapy with different combinations of methotrexate, cisplatin, 5-fluorouracil (5-FU), and leucovorin with or without recombinant interferon-beta have reported response rates of more than 90%.Neoadjuvant chemotherapy with cisplatin and 5-FU (with or without leucovorin), followed by chemoradiation with single-agent cisplatin yield 5-year overall survival rates consistently above 80%. A preliminary analysis of the NPC-2003-GPOH study, which included a 6-month maintenance therapy phase with interferon-beta, reported a 30-month overall survival estimate of 97.1%.While nasopharyngeal carcinoma is a very chemosensitive neoplasm, high radiation doses to the nasopharynx and neck (approximately 60 Gy) are required for optimal locoregional control. The combination of cisplatin-based chemotherapy and high doses of radiation therapy to the nasopharynx and neck are associated with a high probability of hearing loss, hypothyroidism and panhypopituitarism, trismus, xerostomia, dental problems, and chronic sinusitis or otitis.Additional drug combinations that have been used in children with nasopharyngeal carcinoma include bleomycin with epirubicin and cisplatin and cisplatin with methotrexate and bleomycin.Other approaches to the management of nasopharyngeal carcinoma in children have been evaluated and include the following:Incorporation of high-dose-rate brachytherapy into the chemoradiation therapy approach.Following adult data, taxanes have been incorporated into the treatment of childhood nasopharyngeal carcinoma; studies have shown good objective response rates and favorable outcomes with the use of docetaxel in combination with cisplatin.[Level of evidence: 3iiiDiv]
- Surgery: Surgery has a limited role in the management of nasopharyngeal carcinoma because the disease is usually considered unresectable due to extensive local spread.
- EBV-specific cytotoxic T-lymphocytes: The use of EBV-specific cytotoxic T-lymphocytes has shown to be a very promising approach with minimal toxicity and evidence of significant antitumor activity in patients with relapsed or refractory nasopharyngeal carcinoma.
(Refer to the PDQ summary on Nasopharyngeal Cancer Treatment for more information.)
Esthesioneuroblastoma (olfactory neuroblastoma) is a small round-cell tumor arising from the nasal neuroepithelium that is distinct from primitive neuroectodermal tumors. In children, esthesioneuroblastoma is a very rare malignancy with an estimated incidence of 0.1 per 100,000 children younger than 15 years. Despite its rarity, esthesioneuroblastoma is the most common cancer of the nasal cavity in pediatric patients, accounting for 28% of all cases. In a series of 511 patients from the SEER database, there was a slight male predominance, the mean age at presentation was 53 years, and only 8% of cases were younger than 25 years. Most patients were white (81%) and the most common tumor sites were the nasal cavity (72%) and ethmoid sinus (13%).
Most children present in the second decade of life with symptoms that include nasal obstruction, epistaxis, hyposmia, exophthalmos, or a nasopharyngeal mass, which may have local extension into the orbits, sinuses, or frontal lobe. Most patients present with advanced-stage disease (Kadish stages B and C). Recent reports suggest that positron emission tomography–computed tomography (PET-CT) may aid in staging the disease.
A meta-analysis of 26 studies with a total of 390 patients, largely adults with esthesioneuroblastoma, indicates that higher histopathologic grade and metastases to the cervical lymph nodes may correlate with adverse prognostic factors.
The mainstay of treatment has been surgery and radiation. Newer techniques such as endoscopic sinus surgery may offer similar short-term outcomes to open craniofacial resection. Other techniques such as stereotactic radiosurgery and proton-beam therapy (charged-particle radiation therapy) may also play a role in the management of this tumor. Nodal metastases are seen in about 5% of patients. Routine neck dissection and nodal exploration are not indicated in the absence of clinical or radiological evidence of disease. Management of cervical lymph node metastases has been addressed in a review article.
Reports indicate the increasing use of neoadjuvant or adjuvant chemotherapy in patients with advanced-stage disease with promising results.; [Level of evidence: 3iii] Chemotherapy regimens that have been used with efficacy include etoposide with ifosfamide and cisplatin; vincristine, actinomycin D, and cyclophosphamide with and without doxorubicin; ifosfamide/etoposide; cisplatin plus etoposide or doxorubicin;  and irinotecan plus docetaxel.[Level of evidence: 3iiA]
The annual incidence of thyroid cancers is low in children younger than 15 years (2.0 per 1 million people), accounting for approximately 1.5% of all cancers in this age group. Thyroid cancer incidence is higher in children aged 15 to 19 years (17.6 per 1 million people), and it accounts for approximately 8% of cancers arising in this older age group. Most thyroid carcinomas occur in girls.
There is an excessive frequency of thyroid adenoma and carcinoma in patients who previously received radiation to the neck. In the decade following the Chernobyl nuclear incident, there was a tenfold increase in the incidence of thyroid cancer compared to the previous and following decades. In this group of patients with exposure to low-dose radiation, tumors commonly show a gain of 7q11. When occurring in patients with the multiple endocrine neoplasia syndromes, thyroid cancer may be associated with the development of other types of malignant tumors. (Refer to the Multiple Endocrine Neoplasia (MEN) Syndromes and Carney Complex section of this summary for more information.)
Tumors of the thyroid are classified as adenomas or carcinomas. Adenomas are benign growths that may cause enlargement of all or part of the gland, which extends to both sides of the neck and can be quite large; some tumors may secrete hormones. Transformation to a malignant carcinoma may occur in some cells, which then may grow and spread to lymph nodes in the neck or to the lungs. Approximately 20% of thyroid nodules in children are malignant.
- Papillary carcinoma (60%–75%): Papillary carcinoma often has multicentric origin and a very high rate of lymph node metastasis (70%–90%). Papillary carcinoma (often referred to as differentiated thyroid cancer) generally has a benign course, with a 10-year survival rate of more than 95%. Overall, long-term outcomes for children and adolescents with papillary thyroid cancer are excellent, with 2% cause-specific mortality at 40 years.
- Follicular carcinoma (10%–20%): Follicular carcinoma is usually encapsulated and has a higher incidence of bone and lung metastases. It may be sporadic or familial. Follicular carcinoma (often referred to as differentiated thyroid cancer) generally has a benign course, with a 10-year survival rate of more than 95%.
- Medullary carcinoma (5%–10%): Medullary carcinoma is usually familial.
- Anaplastic carcinoma (<1%).
Studies have shown subtle differences in the genetic profiling of childhood differentiated thyroid carcinomas compared with adult tumors. A higher prevalence of RET/PTC rearrangements is seen in pediatric papillary carcinoma (45%–65% vs. 3%–34% in adults). Conversely, BRAF V600E mutations, which are seen in more than 50% of adults with papillary thyroid carcinoma, are extremely rare in children.Table 1. Characteristics of Thyroid Carcinoma in Children and Adolescents Versus AdultsaCharacteristicChildren and Adolescents (%)Adults (%)aAdapted from Yamashita et al.Histologic subtype:Papillary 67–98 85–90Follicular 4–23 <10Medullary 2–8 3Poorly differentiated<0.1 2–7Gene rearrangements:RET/PTC38–87 0–35NTRK 15–11 5–13AKAP9-BRAF11 1PAX8-PPARGUnknown 0–50Point mutations:BRAF0–6 0–43RAS family 0–16 25–69GNAS 0 11TP530–23 0–20Other:Multicentric 30–50 40–56Lymph node involvement 30–90 5–55Extrathyroid extension 24–51 16–46Vascular invasion <31 14–37Distant metastases 10–20 5–10
Patients with thyroid cancer usually present with a thyroid mass with or without cervical adenopathy. Younger age is associated with a more aggressive clinical presentation in differentiated thyroid carcinoma. Compared with adults, children have a higher proportion of nodal involvement (40%–90% vs. 20%–50%) and lung metastases (20%–30% vs. 2%). Likewise, when compared to pubertal adolescents, prepubertal children have a more aggressive presentation with a greater degree of extrathyroid extension, lymph node involvement, and lung metastases. However, outcome is similar in the prepubertal and adolescent groups.
Initial evaluation of a child or adolescent with a thyroid nodule should include the following:
- Ultrasound of the thyroid.
- Serum thyroid-stimulating hormone (TSH) level.
- Serum thyroglobulin level.
Tests of thyroid function are usually normal, but thyroglobulin can be elevated.
Fine-needle aspiration as an initial diagnostic approach is sensitive and useful. However, in doubtful cases, open biopsy or resection should be considered. Open biopsy or resection may be preferable for young children as well.Table 2. Thyroid Carcinomas in ChildrenHistologyAssociated Chromosomal Abnormality PresentationDiagnosisTreatmentEGF = epidermal growth factor; MEN2 = multiple endocrine neoplasia type 2; TSH = thyroid-stimulating hormone.Papillary thyroid carcinoma (differentiated with generally a benign course) RET/PTC more common in children. BRAF V600E mutations seen in adults are rare in children. Thyroid mass. Prepubertal children more often with nodal and lung metastases. Ultrasound, TSH, thyroglobulin. Fine needle or open biopsy. Total or near-total thyroidectomy; I-131; thyroid hormone. In metastatic or recurrent disease, tyrosine kinase or EGF receptor inhibitors may be of benefit. Follicular thyroid carcinoma (differentiated with generally benign course) Sporadic or familialThyroid mass. Prepubertal children more often with nodal and lung metastases.Ultrasound, TSH, thyroglobulin. Fine needle or open biopsy.Total or near-total thyroidectomy; I-131; thyroid hormone. In metastatic or recurrent disease, tyrosine kinase or EGF receptor inhibitors may be of benefit.Medullary thyroid carcinoma MEN2Aggressive. 50% with metastases at presentation.In familial MEN2, RET testing. Aggressive surgical intervention. Prophylactic thyroidectomy is indicated in familial cases.
Treatment of papillary and follicular thyroid carcinoma
The management of differentiated thyroid cancer in children has been reviewed in detail. Also, the American Thyroid Association Taskforce  has developed guidelines for management of thyroid nodules and differentiated thyroid cancer in older adolescents and adults; however, it is not yet known how to apply these guidelines to thyroid nodules in children.
Surgery performed by an experienced thyroid surgeon is the treatment required for all thyroid neoplasms. For patients with papillary or follicular carcinoma, total or near-total thyroidectomy plus cervical lymph node dissection is the recommended surgical approach. This aggressive approach is indicated for several reasons:
- Up to 40% of children with differentiated thyroid carcinoma have multifocal disease and a higher recurrence risk if less than a total thyroidectomy is performed.
- Many children have disseminated disease and require radioactive iodine therapy.
- Sensitive assays for serum thyroglobulin are used as a marker for active disease and are most useful after total thyroidectomy.
The use of radioactive iodine ablation for the treatment of children with differentiated thyroid carcinoma has increased over the years. Despite surgery, most children have a significant radioactive iodine uptake in the thyroid bed, and studies have shown increased local recurrence rates for patients who did not receive radioactive iodine after total thyroidectomy compared with those who did receive radioactive iodine. Thus, it is currently recommended that children receive an ablative dose after initial surgery. For successful remnant ablation, serum TSH levels must be elevated to allow for maximal radioactive iodine uptake; this can usually be achieved with thyroid hormone withdrawal for 3 to 4 weeks after thyroidectomy. A radioactive iodine (I-131) scan is then performed to search for residual, functionally active neoplasm. If there is no disease outside of the thyroid bed, an ablative dose of I-131 (approximately 30 mCi) is administered for total thyroid destruction. If there is evidence of nodal or disseminated disease, higher doses (100–200 mCi) of I-131 are required.[Level of evidence: 3iDiv] In younger children, the I-131 dose may be adjusted for weight (1–1.5 mCi/kg). After surgery and radioactive iodine therapy, hormone replacement therapy must be given to compensate for the lost thyroid hormone and to suppress TSH production.
Initial treatment (defined as surgery plus one radioactive iodine ablation plus thyroid replacement) is effective in inducing remission for 70% of patients. Extensive disease at diagnosis and larger tumor size predict failure to remit. With additional treatment, 89% of patients achieve remission.
Periodic evaluations are required to determine whether there is metastatic disease involving the lungs. Lifelong follow-up is necessary. T4 and TSH levels should be evaluated periodically to determine whether replacement hormone is appropriately dosed. If thyroglobulin levels rise above postthyroidectomy baseline levels, recurrence of the disease is possible, and physical examination and imaging studies should be repeated. The use of various tyrosine kinase inhibitors or vascular endothelial growth factor receptor inhibitors has shown promising results in patients with metastatic or recurrent thyroid cancer in adults.
Treatment of recurrent papillary and follicular thyroid carcinoma
Patients with differentiated thyroid cancer generally have an excellent survival with relatively few side effects. Recurrence is common (35%–45%), however, and is seen more often in children younger than 10 years and in those with palpable cervical lymph nodes at diagnosis. Even patients with a tumor that has spread to the lungs may expect to have no decrease in life span after appropriate treatment. Of note, the sodium-iodide symporter (a membrane-bound glycoprotein cotransporter), essential for uptake of iodide and thyroid hormone synthesis, is expressed in 35% to 45% of thyroid cancers in children and adolescents. Patients with expression of the sodium-iodide symporter have a lower risk of recurrence.
Recurrent papillary thyroid cancer is usually responsive to treatment with radioactive iodine ablation. Tyrosine kinase inhibitors such as sorafenib have shown to induce responses in up to 15% of adult patients with metastatic disease. Responses to sorafenib have also been documented in pediatric cases. Given the high incidence of BRAF mutations in older patients with papillary thyroid carcinoma, the use of selective RAF/MEK inhibitors is being investigated.
Treatment of medullary thyroid carcinoma
Medullary thyroid carcinomas are commonly associated with the MEN2 syndrome (refer to the Multiple Endocrine Neoplasia (MEN) Syndromes and Carney Complex section of this summary for more information). They present with a more aggressive clinical course; 50% of the cases have hematogenous metastases at diagnosis. Patients with medullary carcinoma of the thyroid have a guarded prognosis, unless they have very small tumors (microcarcinoma, defined as <1.0 cm in diameter), which carry a good prognosis.
Treatment for children with medullary thyroid carcinoma is mainly surgical. A recent review of 430 patients aged 0 to 21 years with medullary thyroid cancer reported older age (16–21 years) at diagnosis, tumor diameter greater than 2 cm, positive margins after total thyroidectomy, and lymph node metastases were associated with a worse prognosis. This suggests that central neck node dissection and dissection of nearby positive nodes should improve the 10-year survival for these patients. Most cases of medullary thyroid carcinoma occur in the context of the MEN 2A and MEN 2B syndromes. In those familial cases, early genetic testing and counseling is indicated, and prophylactic surgery is recommended in children with the RET germline mutation. Strong genotype-phenotype correlations have facilitated the development of guidelines for intervention, including screening and age at which prophylactic thyroidectomy should occur. A natural history study of children and young adults with medullary thyroid cancer is being conducted by the National Cancer Institute (NCT01660984).
A number of tyrosine kinase inhibitors have been evaluated for patients with unresectable medullary thyroid cancer. Vandetanib (an inhibitor of RET kinase, vascular endothelial growth factor receptor, and epidermal growth factor receptor signaling) is FDA-approved for the treatment of symptomatic or progressive medullary thyroid cancer in adult patients with unresectable, locally advanced, or metastatic disease. Approval was based on a randomized, placebo-controlled, phase III trial that showed a marked progression-free survival improvement for patients randomly assigned to receive vandetanib (hazard ratio, 0.35); the trial also showed an objective response rate advantage for patients receiving vandetanib (44% vs. 1% for the placebo arm). A phase I trial of vandetanib for children has been completed. Cabozantinib (an inhibitor of the RET and MET kinases and vascular endothelial growth factor receptor) has also shown activity against unresectable medullary thyroid cancer (10 of 35 patients [29%] had a partial response).
(Refer to the Multiple Endocrine Neoplasia (MEN) Syndromes and Carney Complex section of this summary for more information.)
Treatment options under clinical evaluation
The following is an example of a national and/or institutional clinical trial that is currently being conducted. Information about ongoing clinical trials is available from the NCI Web site.
- NCI-07-C-0189 (NCT00514046) (Vandetanib to Treat Children and Adolescents With Medullary Thyroid Cancer): This phase I/II trial of children and adolescents (aged 5–18 years) with medullary thyroid cancer whose tumor cannot be surgically removed, has grown back after treatment, or has metastasized (spread beyond the thyroid gland) is evaluating the activity, safety, and tolerability of vandetanib given once daily.
The vast majority (>90%) of tumors and tumor-like lesions in the oral cavity are benign. Cancer of the oral cavity is extremely rare in children and adolescents. According to the SEER Stat Fact Sheets, only 0.6% of all cases are diagnosed in patients younger than 20 years, and in 2008, the age-adjusted incidence for this population was 0.24 per 100,000.
The incidence of cancer of the oral cavity has increased in adolescent and young adult females, and this pattern is consistent with the national increase in orogenital sexual intercourse in younger females and human papilloma virus (HPV) infection. It is currently estimated that the prevalence of oral HPV infection in the United States is 6.9% in people aged 14 to 69 years and that HPV causes about 30,000 oropharyngeal cancers. Furthermore, the incidence rates for HPV-related oropharyngeal cancer from 1999 to 2008 have increased by 4.4% per year in white men and 1.9% in white women. Current practices to increase HPV immunization rates in both boys and girls may reduce the burden of HPV-related noncervical cancers.
Benign odontogenic neoplasms include odontoma and ameloblastoma. The most common nonodontogenic neoplasms are fibromas, hemangiomas, and papillomas. Tumor-like lesions include lymphangiomas, granulomas, and eosinophilic granuloma (Langerhans cell histiocytosis) (Refer to the Oral mucosa subsection in the PDQ summary on Langerhans Cell Histiocytosis Treatment for more information about Langerhans cell histiocytosis).
Malignant lesions were found in 0.1% to 2% of a series of oral biopsies performed in children  and 3% to 13% of oral tumor biopsies. Malignant tumor types include lymphomas (especially Burkitt) and sarcomas (including rhabdomyosarcoma and fibrosarcoma). Mucoepidermoid carcinomas have rarely been reported in the pediatric and adolescent age group. Most are low grade and have a high cure rate with surgery alone.; [Level of evidence: 3iiA]
The most common type of primary oral cancer in adults, squamous cell carcinoma (SCC), is extremely rare in children. Review of the SEER database identified 54 patients younger than 20 years with oral cavity SCC between 1973 and 2006. Pediatric patients with oral cavity SCC were more often female and had better survival than adult patients. When differences in patient, tumor, and treatment-related characteristics are adjusted for, the two groups experienced equivalent survival.[Level of evidence: 3iA] Diseases that can be associated with the development of oral SCC include Fanconi anemia, dyskeratosis congenita, connexin mutations, chronic graft-versus-host disease, epidermolysis bullosa, xeroderma pigmentosum, and HPV infection.
Treatment of benign oral tumors is surgical. Management of malignant tumors is dependent on histology and may include surgery, chemotherapy, and radiation. Langerhans cell histiocytosis may require other treatment besides surgery. (Refer to the PDQ summaries on adult Oropharyngeal Cancer Treatment; Lip and Oral Cavity Cancer Treatment; and Langerhans Cell Histiocytosis Treatment for more information.)
Salivary Gland Tumors
Salivary gland tumors are rare and account for 0.5% of all malignancies in children and adolescents. Most salivary gland neoplasms arise in the parotid gland. About 15% of these tumors may arise in the submandibular glands or in the minor salivary glands under the tongue and jaw. These tumors are most frequently benign but may be malignant, especially in young children. Overall 5-year survival in the pediatric age group is approximately 95%.
The most common malignant lesion is mucoepidermoid carcinoma. Less common malignancies include acinic cell carcinoma, rhabdomyosarcoma, adenocarcinoma, adenoid cystic carcinoma, and undifferentiated carcinoma. These tumors may occur after radiation therapy and chemotherapy are given for treatment of primary leukemia or solid tumors. Mucoepidermoid carcinoma is the most common type of treatment-related salivary gland tumor, and with standard therapy, the 5-year survival is about 95%.
Radical surgical removal is the treatment of choice for salivary gland tumors whenever possible, with additional use of radiation therapy and chemotherapy for high-grade tumors or tumors that have spread from their site of origin.
(Refer to the PDQ summary on adult Salivary Gland Cancer Treatment for more information.)
Sialoblastoma is a usually benign tumor presenting in the neonatal period and rarely metastasizes. Chemotherapy regimens with carboplatin, epirubicin, vincristine, etoposide, dactinomycin, doxorubicin, and ifosfamide have produced responses in two children with sialoblastoma.; [Level of evidence: 3iiiDiv]
Laryngeal Cancer and Papillomatosis
Tumors of the larynx are rare. The most common benign tumor is subglottic hemangioma. Malignant tumors, which are especially rare, may be associated with benign tumors such as polyps and papillomas. These tumors may cause hoarseness, difficulty swallowing, and enlargement of the lymph nodes of the neck.
Rhabdomyosarcoma is the most common malignant tumor of the larynx in the pediatric age group and is usually managed with chemotherapy and radiation therapy following biopsy, rather than laryngectomy. SCC of the larynx should be managed in the same manner as in adults with carcinoma at this site, with surgery and radiation. Laser surgery may be the first type of treatment utilized for these lesions.
Papillomatosis of the larynx is a benign overgrowth of tissues lining the larynx and is associated with the HPV, most commonly HPV-6 and HPV-11. The presence of HPV-11 appears to correlate with a more aggressive clinical course than HPV-6. These tumors can cause hoarseness because of their association with wart-like nodules on the vocal cords and may rarely extend into the lung, producing significant morbidity. Malignant degeneration may occur with development of cancer in the larynx and squamous cell lung cancer.
Papillomatosis is not cancerous, and primary treatment is surgical ablation with laser vaporization. Frequent recurrences are common. Lung involvement, although rare, can occur. If a patient requires more than four surgical procedures per year, treatment with interferon may be considered. A pilot study of immunotherapy with HspE7, a recombinant fusion protein that has shown activity in other HPV-related diseases, has suggested a marked increase in the amount of time between surgeries. These results, however, must be confirmed in a larger randomized trial.
(Refer to the PDQ summary on adult Laryngeal Cancer Treatment for more information.)
Midline Tract Carcinoma Involving the NUT Gene (NUT Midline Carcinoma)
NUT midline carcinoma is a very rare and aggressive malignancy genetically defined by rearrangements of the gene NUT. In the majority (75%) of cases, the NUT gene on chromosome 15q14 is fused with BRD4 on chromosome 19p13, creating chimeric genes that encode the BRD-NUT fusion proteins. In the remaining cases, NUT is fused to BRD3 on chromosome 9q34 or an unknown partner gene; these tumors are termed NUT-variant.
The tumors arise in midline epithelial structures, typically mediastinum and upper aerodigestive track, and present as very aggressive undifferentiated carcinomas, with or without squamous differentiation. Although the original description of this neoplasm was made in children and young adults, patients of all ages can be affected. The outcome is very poor, with an average survival of less than 1 year. Preliminary data seem to indicate that NUT-variant tumors may have a more protracted course.
Preclinical studies have shown that NUT-BRD4 is associated with globally decreased histone acetylation and transcriptional repression; studies have also shown that this acetylation can be restored with histone deacetylase inhibitors, resulting in squamous differentiation and arrested growth in vitro and growth inhibition in xenograft models. Response to vorinostat has been reported in a case of a child with refractory disease, thus suggesting a potential role for this class of agents in the treatment of this malignancy.1Gil Z, Patel SG, Cantu G, et al.: Outcome of craniofacial surgery in children and adolescents with malignant tumors involving the skull base: an international collaborative study. Head Neck 31 (3): 308-17, 2009.2Vasef MA, Ferlito A, Weiss LM: Nasopharyngeal carcinoma, with emphasis on its relationship to Epstein-Barr virus. Ann Otol Rhinol Laryngol 106 (4): 348-56, 1997.3Ayan I, Kaytan E, Ayan N: Childhood nasopharyngeal carcinoma: from biology to treatment. Lancet Oncol 4 (1): 13-21, 2003.4Horner MJ, Ries LA, Krapcho M, et al.: SEER Cancer Statistics Review, 1975-2006. Bethesda, Md: National Cancer Institute, 2009. Also available online. Last accessed April 04, 2013.5Sultan I, Casanova M, Ferrari A, et al.: Differential features of nasopharyngeal carcinoma in children and adults: a SEER study. Pediatr Blood Cancer 55 (2): 279-84, 2010.6Cheuk DK, Billups CA, Martin MG, et al.: Prognostic factors and long-term outcomes of childhood nasopharyngeal carcinoma. Cancer 117 (1): 197-206, 2011.7Dawson CW, Port RJ, Young LS: The role of the EBV-encoded latent membrane proteins LMP1 and LMP2 in the pathogenesis of nasopharyngeal carcinoma (NPC). Semin Cancer Biol 22 (2): 144-53, 2012.8Lo YM, Chan LY, Lo KW, et al.: Quantitative analysis of cell-free Epstein-Barr virus DNA in plasma of patients with nasopharyngeal carcinoma. Cancer Res 59 (6): 1188-91, 1999.9Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010.10Casanova M, Ferrari A, Gandola L, et al.: Undifferentiated nasopharyngeal carcinoma in children and adolescents: comparison between staging systems. Ann Oncol 12 (8): 1157-62, 2001.11Casanova M, Bisogno G, Gandola L, et al.: A prospective protocol for nasopharyngeal carcinoma in children and adolescents: the Italian Rare Tumors in Pediatric Age (TREP) project. Cancer 118 (10): 2718-25, 2012.12Buehrlen M, Zwaan CM, Granzen B, et al.: Multimodal treatment, including interferon beta, of nasopharyngeal carcinoma in children and young adults: preliminary results from the prospective, multicenter study NPC-2003-GPOH/DCOG. Cancer 118 (19): 4892-900, 2012.13Al-Sarraf M, LeBlanc M, Giri PG, et al.: Chemoradiotherapy versus radiotherapy in patients with advanced nasopharyngeal cancer: phase III randomized Intergroup study 0099. J Clin Oncol 16 (4): 1310-7, 1998.14Wolden SL, Steinherz PG, Kraus DH, et al.: Improved long-term survival with combined modality therapy for pediatric nasopharynx cancer. Int J Radiat Oncol Biol Phys 46 (4): 859-64, 2000.15Langendijk JA, Leemans ChR, Buter J, et al.: The additional value of chemotherapy to radiotherapy in locally advanced nasopharyngeal carcinoma: a meta-analysis of the published literature. J Clin Oncol 22 (22): 4604-12, 2004.16Venkitaraman R, Ramanan SG, Sagar TG: Nasopharyngeal cancer of childhood and adolescence: a single institution experience. Pediatr Hematol Oncol 24 (7): 493-502, 2007 Oct-Nov.17Mertens R, Granzen B, Lassay L, et al.: Treatment of nasopharyngeal carcinoma in children and adolescents: definitive results of a multicenter study (NPC-91-GPOH). Cancer 104 (5): 1083-9, 2005.18Rodriguez-Galindo C, Wofford M, Castleberry RP, et al.: Preradiation chemotherapy with methotrexate, cisplatin, 5-fluorouracil, and leucovorin for pediatric nasopharyngeal carcinoma. Cancer 103 (4): 850-7, 2005.19Nakamura RA, Novaes PE, Antoneli CB, et al.: High-dose-rate brachytherapy as part of a multidisciplinary treatment of nasopharyngeal lymphoepithelioma in childhood. Cancer 104 (3): 525-31, 2005.20Louis CU, Paulino AC, Gottschalk S, et al.: A single institution experience with pediatric nasopharyngeal carcinoma: high incidence of toxicity associated with platinum-based chemotherapy plus IMRT. J Pediatr Hematol Oncol 29 (7): 500-5, 2007.21Varan A, Ozyar E, Corapçioğlu F, et al.: Pediatric and young adult nasopharyngeal carcinoma patients treated with preradiation Cisplatin and docetaxel chemotherapy. Int J Radiat Oncol Biol Phys 73 (4): 1116-20, 2009.22Straathof KC, Bollard CM, Popat U, et al.: Treatment of nasopharyngeal carcinoma with Epstein-Barr virus--specific T lymphocytes. Blood 105 (5): 1898-904, 2005.23Kumar M, Fallon RJ, Hill JS, et al.: Esthesioneuroblastoma in children. J Pediatr Hematol Oncol 24 (6): 482-7, 2002 Aug-Sep.24Theilgaard SA, Buchwald C, Ingeholm P, et al.: Esthesioneuroblastoma: a Danish demographic study of 40 patients registered between 1978 and 2000. Acta Otolaryngol 123 (3): 433-9, 2003.25Dias FL, Sa GM, Lima RA, et al.: Patterns of failure and outcome in esthesioneuroblastoma. Arch Otolaryngol Head Neck Surg 129 (11): 1186-92, 2003.26Nakao K, Watanabe K, Fujishiro Y, et al.: Olfactory neuroblastoma: long-term clinical outcome at a single institute between 1979 and 2003. Acta Otolaryngol Suppl (559): 113-7, 2007.27Bisogno G, Soloni P, Conte M, et al.: Esthesioneuroblastoma in pediatric and adolescent age. A report from the TREP project in cooperation with the Italian Neuroblastoma and Soft Tissue Sarcoma Committees. BMC Cancer 12: 117, 2012.28Benoit MM, Bhattacharyya N, Faquin W, et al.: Cancer of the nasal cavity in the pediatric population. Pediatrics 121 (1): e141-5, 2008.29Soler ZM, Smith TL: Endoscopic versus open craniofacial resection of esthesioneuroblastoma: what is the evidence? Laryngoscope 122 (2): 244-5, 2012.30Broski SM, Hunt CH, Johnson GB, et al.: The added value of 18F-FDG PET/CT for evaluation of patients with esthesioneuroblastoma. J Nucl Med 53 (8): 1200-6, 2012.31Dulguerov P, Allal AS, Calcaterra TC: Esthesioneuroblastoma: a meta-analysis and review. Lancet Oncol 2 (11): 683-90, 2001.32Ozsahin M, Gruber G, Olszyk O, et al.: Outcome and prognostic factors in olfactory neuroblastoma: a rare cancer network study. Int J Radiat Oncol Biol Phys 78 (4): 992-7, 2010.33Unger F, Haselsberger K, Walch C, et al.: Combined endoscopic surgery and radiosurgery as treatment modality for olfactory neuroblastoma (esthesioneuroblastoma). Acta Neurochir (Wien) 147 (6): 595-601; discussion 601-2, 2005.34Zanation AM, Ferlito A, Rinaldo A, et al.: When, how and why to treat the neck in patients with esthesioneuroblastoma: a review. Eur Arch Otorhinolaryngol 267 (11): 1667-71, 2010.35Eich HT, Müller RP, Micke O, et al.: Esthesioneuroblastoma in childhood and adolescence. Better prognosis with multimodal treatment? Strahlenther Onkol 181 (6): 378-84, 2005.36Loy AH, Reibel JF, Read PW, et al.: Esthesioneuroblastoma: continued follow-up of a single institution's experience. Arch Otolaryngol Head Neck Surg 132 (2): 134-8, 2006.37Porter AB, Bernold DM, Giannini C, et al.: Retrospective review of adjuvant chemotherapy for esthesioneuroblastoma. J Neurooncol 90 (2): 201-4, 2008.38Benfari G, Fusconi M, Ciofalo A, et al.: Radiotherapy alone for local tumour control in esthesioneuroblastoma. Acta Otorhinolaryngol Ital 28 (6): 292-7, 2008.39Kim DW, Jo YH, Kim JH, et al.: Neoadjuvant etoposide, ifosfamide, and cisplatin for the treatment of olfactory neuroblastoma. Cancer 101 (10): 2257-60, 2004.40Kiyota N, Tahara M, Fujii S, et al.: Nonplatinum-based chemotherapy with irinotecan plus docetaxel for advanced or metastatic olfactory neuroblastoma: a retrospective analysis of 12 cases. Cancer 112 (4): 885-91, 2008.41Shapiro NL, Bhattacharyya N: Population-based outcomes for pediatric thyroid carcinoma. Laryngoscope 115 (2): 337-40, 2005.42Cotterill SJ, Pearce MS, Parker L: Thyroid cancer in children and young adults in the North of England. Is increasing incidence related to the Chernobyl accident? Eur J Cancer 37 (8): 1020-6, 2001.43Kaplan MM, Garnick MB, Gelber R, et al.: Risk factors for thyroid abnormalities after neck irradiation for childhood cancer. Am J Med 74 (2): 272-80, 1983.44Demidchik YE, Saenko VA, Yamashita S: Childhood thyroid cancer in Belarus, Russia, and Ukraine after Chernobyl and at present. Arq Bras Endocrinol Metabol 51 (5): 748-62, 2007.45Hess J, Thomas G, Braselmann H, et al.: Gain of chromosome band 7q11 in papillary thyroid carcinomas of young patients is associated with exposure to low-dose irradiation. Proc Natl Acad Sci U S A 108 (23): 9595-600, 2011.46Dinauer C, Francis GL: Thyroid cancer in children. Endocrinol Metab Clin North Am 36 (3): 779-806, vii, 2007.47Vasko V, Bauer AJ, Tuttle RM, et al.: Papillary and follicular thyroid cancers in children. Endocr Dev 10: 140-72, 2007.48Grigsby PW, Gal-or A, Michalski JM, et al.: Childhood and adolescent thyroid carcinoma. Cancer 95 (4): 724-9, 2002.49Skinner MA: Cancer of the thyroid gland in infants and children. Semin Pediatr Surg 10 (3): 119-26, 2001.50Halac I, Zimmerman D: Thyroid nodules and cancers in children. Endocrinol Metab Clin North Am 34 (3): 725-44, x, 2005.51Waguespack SG, Francis G: Initial management and follow-up of differentiated thyroid cancer in children. J Natl Compr Canc Netw 8 (11): 1289-300, 2010.52Feinmesser R, Lubin E, Segal K, et al.: Carcinoma of the thyroid in children--a review. J Pediatr Endocrinol Metab 10 (6): 561-8, 1997 Nov-Dec.53Hung W, Sarlis NJ: Current controversies in the management of pediatric patients with well-differentiated nonmedullary thyroid cancer: a review. Thyroid 12 (8): 683-702, 2002.54Hay ID, Gonzalez-Losada T, Reinalda MS, et al.: Long-term outcome in 215 children and adolescents with papillary thyroid cancer treated during 1940 through 2008. World J Surg 34 (6): 1192-202, 2010.55Skinner MA: Management of hereditary thyroid cancer in children. Surg Oncol 12 (2): 101-4, 2003.56Rivkees SA, Mazzaferri EL, Verburg FA, et al.: The treatment of differentiated thyroid cancer in children: emphasis on surgical approach and radioactive iodine therapy. Endocr Rev 32 (6): 798-826, 2011.57Yamashita S, Saenko V: Mechanisms of Disease: molecular genetics of childhood thyroid cancers. Nat Clin Pract Endocrinol Metab 3 (5): 422-9, 2007.58Thompson GB, Hay ID: Current strategies for surgical management and adjuvant treatment of childhood papillary thyroid carcinoma. World J Surg 28 (12): 1187-98, 2004.59Harness JK, Sahar DE, et al.: Childhood thyroid carcinoma. In: Clark O, Duh Q-Y, Kebebew E, eds.: Textbook of Endocrine Surgery. 2nd ed. Philadelphia, PA: Elsevier Saunders Company, 2005., pp 93-101.60Rachmiel M, Charron M, Gupta A, et al.: Evidence-based review of treatment and follow up of pediatric patients with differentiated thyroid carcinoma. J Pediatr Endocrinol Metab 19 (12): 1377-93, 2006.61Wada N, Sugino K, Mimura T, et al.: Treatment strategy of papillary thyroid carcinoma in children and adolescents: clinical significance of the initial nodal manifestation. Ann Surg Oncol 16 (12): 3442-9, 2009.62Lazar L, Lebenthal Y, Steinmetz A, et al.: Differentiated thyroid carcinoma in pediatric patients: comparison of presentation and course between pre-pubertal children and adolescents. J Pediatr 154 (5): 708-14, 2009.63Flannery TK, Kirkland JL, Copeland KC, et al.: Papillary thyroid cancer: a pediatric perspective. Pediatrics 98 (3 Pt 1): 464-6, 1996.64Willgerodt H, Keller E, Bennek J, et al.: Diagnostic value of fine-needle aspiration biopsy of thyroid nodules in children and adolescents. J Pediatr Endocrinol Metab 19 (4): 507-15, 2006.65Stevens C, Lee JK, Sadatsafavi M, et al.: Pediatric thyroid fine-needle aspiration cytology: a meta-analysis. J Pediatr Surg 44 (11): 2184-91, 2009.66Bargren AE, Meyer-Rochow GY, Sywak MS, et al.: Diagnostic utility of fine-needle aspiration cytology in pediatric differentiated thyroid cancer. World J Surg 34 (6): 1254-60, 2010.67Redlich A, Boxberger N, Kurt Werner S, et al.: Sensitivity of fine-needle biopsy in detecting pediatric differentiated thyroid carcinoma. Pediatr Blood Cancer 59 (2): 233-7, 2012.68Cooper DS, Doherty GM, Haugen BR, et al.: Revised American Thyroid Association management guidelines for patients with thyroid nodules and differentiated thyroid cancer. Thyroid 19 (11): 1167-214, 2009.69Raval MV, Bentrem DJ, Stewart AK, et al.: Utilization of total thyroidectomy for differentiated thyroid cancer in children. Ann Surg Oncol 17 (10): 2545-53, 2010.70Newman KD, Black T, Heller G, et al.: Differentiated thyroid cancer: determinants of disease progression in patients <21 years of age at diagnosis: a report from the Surgical Discipline Committee of the Children's Cancer Group. Ann Surg 227 (4): 533-41, 1998.71Chow SM, Law SC, Mendenhall WM, et al.: Differentiated thyroid carcinoma in childhood and adolescence-clinical course and role of radioiodine. Pediatr Blood Cancer 42 (2): 176-83, 2004.72Verburg FA, Biko J, Diessl S, et al.: I-131 activities as high as safely administrable (AHASA) for the treatment of children and adolescents with advanced differentiated thyroid cancer. J Clin Endocrinol Metab 96 (8): E1268-71, 2011.73Luster M, Lassmann M, Freudenberg LS, et al.: Thyroid cancer in childhood: management strategy, including dosimetry and long-term results. Hormones (Athens) 6 (4): 269-78, 2007 Oct-Dec.74Parisi MT, Mankoff D: Differentiated pediatric thyroid cancer: correlates with adult disease, controversies in treatment. Semin Nucl Med 37 (5): 340-56, 2007.75Yeh SD, La Quaglia MP: 131I therapy for pediatric thyroid cancer. Semin Pediatr Surg 6 (3): 128-33, 1997.76Powers PA, Dinauer CA, Tuttle RM, et al.: Tumor size and extent of disease at diagnosis predict the response to initial therapy for papillary thyroid carcinoma in children and adolescents. J Pediatr Endocrinol Metab 16 (5): 693-702, 2003.77Vassilopoulou-Sellin R, Goepfert H, Raney B, et al.: Differentiated thyroid cancer in children and adolescents: clinical outcome and mortality after long-term follow-up. Head Neck 20 (6): 549-55, 1998.78Kloos RT, Ringel MD, Knopp MV, et al.: Phase II trial of sorafenib in metastatic thyroid cancer. J Clin Oncol 27 (10): 1675-84, 2009.79Cohen EE, Rosen LS, Vokes EE, et al.: Axitinib is an active treatment for all histologic subtypes of advanced thyroid cancer: results from a phase II study. J Clin Oncol 26 (29): 4708-13, 2008.80Schlumberger MJ, Elisei R, Bastholt L, et al.: Phase II study of safety and efficacy of motesanib in patients with progressive or symptomatic, advanced or metastatic medullary thyroid cancer. J Clin Oncol 27 (23): 3794-801, 2009.81Cabanillas ME, Waguespack SG, Bronstein Y, et al.: Treatment with tyrosine kinase inhibitors for patients with differentiated thyroid cancer: the M. D. Anderson experience. J Clin Endocrinol Metab 95 (6): 2588-95, 2010.82Wiersinga WM: Thyroid cancer in children and adolescents--consequences in later life. J Pediatr Endocrinol Metab 14 (Suppl 5): 1289-96; discussion 1297-8, 2001.83Jarzab B, Handkiewicz-Junak D, Wloch J: Juvenile differentiated thyroid carcinoma and the role of radioiodine in its treatment: a qualitative review. Endocr Relat Cancer 12 (4): 773-803, 2005.84Alessandri AJ, Goddard KJ, Blair GK, et al.: Age is the major determinant of recurrence in pediatric differentiated thyroid carcinoma. Med Pediatr Oncol 35 (1): 41-6, 2000.85Borson-Chazot F, Causeret S, Lifante JC, et al.: Predictive factors for recurrence from a series of 74 children and adolescents with differentiated thyroid cancer. World J Surg 28 (11): 1088-92, 2004.86Biko J, Reiners C, Kreissl MC, et al.: Favourable course of disease after incomplete remission on (131)I therapy in children with pulmonary metastases of papillary thyroid carcinoma: 10 years follow-up. Eur J Nucl Med Mol Imaging 38 (4): 651-5, 2011.87Patel A, Jhiang S, Dogra S, et al.: Differentiated thyroid carcinoma that express sodium-iodide symporter have a lower risk of recurrence for children and adolescents. Pediatr Res 52 (5): 737-44, 2002.88Powers PA, Dinauer CA, Tuttle RM, et al.: Treatment of recurrent papillary thyroid carcinoma in children and adolescents. J Pediatr Endocrinol Metab 16 (7): 1033-40, 2003.89Waguespack SG, Sherman SI, Williams MD, et al.: The successful use of sorafenib to treat pediatric papillary thyroid carcinoma. Thyroid 19 (4): 407-12, 2009.90Falchook GS, Long GV, Kurzrock R, et al.: Dabrafenib in patients with melanoma, untreated brain metastases, and other solid tumours: a phase 1 dose-escalation trial. Lancet 379 (9829): 1893-901, 2012.91Hayes DN, Lucas AS, Tanvetyanon T, et al.: Phase II efficacy and pharmacogenomic study of Selumetinib (AZD6244; ARRY-142886) in iodine-131 refractory papillary thyroid carcinoma with or without follicular elements. Clin Cancer Res 18 (7): 2056-65, 2012.92Waguespack SG, Rich TA, Perrier ND, et al.: Management of medullary thyroid carcinoma and MEN2 syndromes in childhood. Nat Rev Endocrinol 7 (10): 596-607, 2011.93Krueger JE, Maitra A, Albores-Saavedra J: Inherited medullary microcarcinoma of the thyroid: a study of 11 cases. Am J Surg Pathol 24 (6): 853-8, 2000.94Raval MV, Sturgeon C, Bentrem DJ, et al.: Influence of lymph node metastases on survival in pediatric medullary thyroid cancer. J Pediatr Surg 45 (10): 1947-54, 2010.95Wells SA Jr, Robinson BG, Gagel RF, et al.: Vandetanib in patients with locally advanced or metastatic medullary thyroid cancer: a randomized, double-blind phase III trial. J Clin Oncol 30 (2): 134-41, 2012.96Thornton K, Kim G, Maher VE, et al.: Vandetanib for the treatment of symptomatic or progressive medullary thyroid cancer in patients with unresectable locally advanced or metastatic disease: U.S. Food and Drug Administration drug approval summary. Clin Cancer Res 18 (14): 3722-30, 2012.97Broniscer A, Baker JN, Tagen M, et al.: Phase I study of vandetanib during and after radiotherapy in children with diffuse intrinsic pontine glioma. J Clin Oncol 28 (31): 4762-8, 2010.98Kurzrock R, Sherman SI, Ball DW, et al.: Activity of XL184 (Cabozantinib), an oral tyrosine kinase inhibitor, in patients with medullary thyroid cancer. J Clin Oncol 29 (19): 2660-6, 2011.99Das S, Das AK: A review of pediatric oral biopsies from a surgical pathology service in a dental school. Pediatr Dent 15 (3): 208-11, 1993 May-Jun.100Ulmansky M, Lustmann J, Balkin N: Tumors and tumor-like lesions of the oral cavity and related structures in Israeli children. Int J Oral Maxillofac Surg 28 (4): 291-4, 1999.101Tröbs RB, Mader E, Friedrich T, et al.: Oral tumors and tumor-like lesions in infants and children. Pediatr Surg Int 19 (9-10): 639-45, 2003.102Tanaka N, Murata A, Yamaguchi A, et al.: Clinical features and management of oral and maxillofacial tumors in children. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 88 (1): 11-5, 1999.103Young JL Jr, Miller RW: Incidence of malignant tumors in U. S. children. J Pediatr 86 (2): 254-8, 1975.104Berstein L, Gurney JG: Carcinomas and other malignant epithelial neoplasms. In: Ries LA, Smith MA, Gurney JG, et al., eds.: Cancer incidence and survival among children and adolescents: United States SEER Program 1975-1995. Bethesda, Md: National Cancer Institute, SEER Program, 1999. NIH Pub.No. 99-4649., Chapter 11, pp 139-148. Also available online. Last accessed April 04, 2013.105Bleyer A: Cancer of the oral cavity and pharynx in young females: increasing incidence, role of human papilloma virus, and lack of survival improvement. Semin Oncol 36 (5): 451-9, 2009.106D'Souza G, Dempsey A: The role of HPV in head and neck cancer and review of the HPV vaccine. Prev Med 53 (Suppl 1): S5-S11, 2011.107Gillison ML, Broutian T, Pickard RK, et al.: Prevalence of oral HPV infection in the United States, 2009-2010. JAMA 307 (7): 693-703, 2012.108Simard EP, Ward EM, Siegel R, et al.: Cancers with increasing incidence trends in the United States: 1999 through 2008. CA Cancer J Clin : , 2012.109Gillison ML, Chaturvedi AK, Lowy DR: HPV prophylactic vaccines and the potential prevention of noncervical cancers in both men and women. Cancer 113 (10 Suppl): 3036-46, 2008.110Morris LG, Ganly I: Outcomes of oral cavity squamous cell carcinoma in pediatric patients. Oral Oncol 46 (4): 292-6, 2010.111Perez DE, Pires FR, Alves Fde A, et al.: Juvenile intraoral mucoepidermoid carcinoma. J Oral Maxillofac Surg 66 (2): 308-11, 2008.112Oksüzoğlu B, Yalçin S: Squamous cell carcinoma of the tongue in a patient with Fanconi's anemia: a case report and review of the literature. Ann Hematol 81 (5): 294-8, 2002.113Reinhard H, Peters I, Gottschling S, et al.: Squamous cell carcinoma of the tongue in a 13-year-old girl with Fanconi anemia. J Pediatr Hematol Oncol 29 (7): 488-91, 2007.114Ragin CC, Modugno F, Gollin SM: The epidemiology and risk factors of head and neck cancer: a focus on human papillomavirus. J Dent Res 86 (2): 104-14, 2007.115Fine JD, Johnson LB, Weiner M, et al.: Epidermolysis bullosa and the risk of life-threatening cancers: the National EB Registry experience, 1986-2006. J Am Acad Dermatol 60 (2): 203-11, 2009.116Kraemer KH, Lee MM, Scotto J: Xeroderma pigmentosum. Cutaneous, ocular, and neurologic abnormalities in 830 published cases. Arch Dermatol 123 (2): 241-50, 1987.117Alter BP: Cancer in Fanconi anemia, 1927-2001. Cancer 97 (2): 425-40, 2003.118Mazereeuw-Hautier J, Bitoun E, Chevrant-Breton J, et al.: Keratitis-ichthyosis-deafness syndrome: disease expression and spectrum of connexin 26 (GJB2) mutations in 14 patients. Br J Dermatol 156 (5): 1015-9, 2007.119Alter BP, Giri N, Savage SA, et al.: Cancer in dyskeratosis congenita. Blood 113 (26): 6549-57, 2009.120Sturgis EM, Moore BA, Glisson BS, et al.: Neoadjuvant chemotherapy for squamous cell carcinoma of the oral tongue in young adults: a case series. Head Neck 27 (9): 748-56, 2005.121Woo VL, Kelsch RD, Su L, et al.: Gingival squamous cell carcinoma in adolescence. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 107 (1): 92-9, 2009.122Sultan I, Rodriguez-Galindo C, Al-Sharabati S, et al.: Salivary gland carcinomas in children and adolescents: a population-based study, with comparison to adult cases. Head Neck 33 (10): 1476-81, 2011.123Ethunandan M, Ethunandan A, Macpherson D, et al.: Parotid neoplasms in children: experience of diagnosis and management in a district general hospital. Int J Oral Maxillofac Surg 32 (4): 373-7, 2003.124da Cruz Perez DE, Pires FR, Alves FA, et al.: Salivary gland tumors in children and adolescents: a clinicopathologic and immunohistochemical study of fifty-three cases. Int J Pediatr Otorhinolaryngol 68 (7): 895-902, 2004.125Shapiro NL, Bhattacharyya N: Clinical characteristics and survival for major salivary gland malignancies in children. Otolaryngol Head Neck Surg 134 (4): 631-4, 2006.126Ellies M, Schaffranietz F, Arglebe C, et al.: Tumors of the salivary glands in childhood and adolescence. J Oral Maxillofac Surg 64 (7): 1049-58, 2006.127Muenscher A, Diegel T, Jaehne M, et al.: Benign and malignant salivary gland diseases in children A retrospective study of 549 cases from the Salivary Gland Registry, Hamburg. Auris Nasus Larynx 36 (3): 326-31, 2009.128Fu H, Wang J, Wang L, et al.: Pleomorphic adenoma of the salivary glands in children and adolescents. J Pediatr Surg 47 (4): 715-9, 2012.129Laikui L, Hongwei L, Hongbing J, et al.: Epithelial salivary gland tumors of children and adolescents in west China population: a clinicopathologic study of 79 cases. J Oral Pathol Med 37 (4): 201-5, 2008.130Rutt AL, Hawkshaw MJ, Lurie D, et al.: Salivary gland cancer in patients younger than 30 years. Ear Nose Throat J 90 (4): 174-84, 2011.131Rahbar R, Grimmer JF, Vargas SO, et al.: Mucoepidermoid carcinoma of the parotid gland in children: A 10-year experience. Arch Otolaryngol Head Neck Surg 132 (4): 375-80, 2006.132Kupferman ME, de la Garza GO, Santillan AA, et al.: Outcomes of pediatric patients with malignancies of the major salivary glands. Ann Surg Oncol 17 (12): 3301-7, 2010.133Kaste SC, Hedlund G, Pratt CB: Malignant parotid tumors in patients previously treated for childhood cancer: clinical and imaging findings in eight cases. AJR Am J Roentgenol 162 (3): 655-9, 1994.134Whatley WS, Thompson JW, Rao B: Salivary gland tumors in survivors of childhood cancer. Otolaryngol Head Neck Surg 134 (3): 385-8, 2006.135Verma J, Teh BS, Paulino AC: Characteristics and outcome of radiation and chemotherapy-related mucoepidermoid carcinoma of the salivary glands. Pediatr Blood Cancer 57 (7): 1137-41, 2011.136Védrine PO, Coffinet L, Temam S, et al.: Mucoepidermoid carcinoma of salivary glands in the pediatric age group: 18 clinical cases, including 11 second malignant neoplasms. Head Neck 28 (9): 827-33, 2006.137Kamal SA, Othman EO: Diagnosis and treatment of parotid tumours. J Laryngol Otol 111 (4): 316-21, 1997.138Ryan JT, El-Naggar AK, Huh W, et al.: Primacy of surgery in the management of mucoepidermoid carcinoma in children. Head Neck 33 (12): 1769-73, 2011.139Williams SB, Ellis GL, Warnock GR: Sialoblastoma: a clinicopathologic and immunohistochemical study of 7 cases. Ann Diagn Pathol 10 (6): 320-6, 2006.140Prigent M, Teissier N, Peuchmaur M, et al.: Sialoblastoma of salivary glands in children: chemotherapy should be discussed as an alternative to mutilating surgery. Int J Pediatr Otorhinolaryngol 74 (8): 942-5, 2010.141Scott JX, Krishnan S, Bourne AJ, et al.: Treatment of metastatic sialoblastoma with chemotherapy and surgery. Pediatr Blood Cancer 50 (1): 134-7, 2008.142Bitar MA, Moukarbel RV, Zalzal GH: Management of congenital subglottic hemangioma: trends and success over the past 17 years. Otolaryngol Head Neck Surg 132 (2): 226-31, 2005.143McGuirt WF Jr, Little JP: Laryngeal cancer in children and adolescents. Otolaryngol Clin North Am 30 (2): 207-14, 1997.144Bauman NM, Smith RJ: Recurrent respiratory papillomatosis. Pediatr Clin North Am 43 (6): 1385-401, 1996.145Wharam MD Jr, Foulkes MA, Lawrence W Jr, et al.: Soft tissue sarcoma of the head and neck in childhood: nonorbital and nonparameningeal sites. A report of the Intergroup Rhabdomyosarcoma Study (IRS)-I. Cancer 53 (4): 1016-9, 1984.146Siddiqui F, Sarin R, Agarwal JP, et al.: Squamous carcinoma of the larynx and hypopharynx in children: a distinct clinical entity? Med Pediatr Oncol 40 (5): 322-4, 2003.147Kashima HK, Mounts P, Shah K: Recurrent respiratory papillomatosis. Obstet Gynecol Clin North Am 23 (3): 699-706, 1996.148Maloney EM, Unger ER, Tucker RA, et al.: Longitudinal measures of human papillomavirus 6 and 11 viral loads and antibody response in children with recurrent respiratory papillomatosis. Arch Otolaryngol Head Neck Surg 132 (7): 711-5, 2006.149Gélinas JF, Manoukian J, Côté A: Lung involvement in juvenile onset recurrent respiratory papillomatosis: a systematic review of the literature. Int J Pediatr Otorhinolaryngol 72 (4): 433-52, 2008.150Andrus JG, Shapshay SM: Contemporary management of laryngeal papilloma in adults and children. Otolaryngol Clin North Am 39 (1): 135-58, 2006.151Avidano MA, Singleton GT: Adjuvant drug strategies in the treatment of recurrent respiratory papillomatosis. Otolaryngol Head Neck Surg 112 (2): 197-202, 1995.152Derkay CS, Smith RJ, McClay J, et al.: HspE7 treatment of pediatric recurrent respiratory papillomatosis: final results of an open-label trial. Ann Otol Rhinol Laryngol 114 (9): 730-7, 2005.153French CA: NUT midline carcinoma. Cancer Genet Cytogenet 203 (1): 16-20, 2010.154French CA, Kutok JL, Faquin WC, et al.: Midline carcinoma of children and young adults with NUT rearrangement. J Clin Oncol 22 (20): 4135-9, 2004.155Schwartz BE, Hofer MD, Lemieux ME, et al.: Differentiation of NUT midline carcinoma by epigenomic reprogramming. Cancer Res 71 (7): 2686-96, 2011.
Thoracic cancers include breast cancer, bronchial adenomas, bronchial carcinoid tumors, pleuropulmonary blastoma, esophageal tumors, thymomas, thymic carcinomas, cardiac tumors, and mesothelioma. The prognosis, diagnosis, classification, and treatment of these thoracic cancers are discussed below. It must be emphasized that these cancers are seen very infrequently in patients younger than 15 years, and most of the evidence is derived from case series.
The most frequent breast tumor seen in children is a fibroadenoma. These tumors can be observed and many will regress without a need for biopsy. However, rare malignant transformation leading to phyllodes tumors has been reported. Sudden rapid enlargement of a suspected fibroadenoma is an indication for needle biopsy or excision. Phyllodes tumors can be managed by wide local excision without mastectomy.
Malignant breast tumors
Incidence, epidemiology, and treatment
Breast cancer has been reported in both males and females younger than 21 years. A review of the Surveillance, Epidemiology, and End Results (SEER) database shows that 75 cases of malignant breast tumors in females 19 years or younger were identified from 1973 to 2004. Fifteen percent of these patients had in situ disease, 85% had invasive disease, 55% of the tumors were carcinomas, and 45% of the tumors were sarcomas—most of which were phyllodes tumors. Only three patients in the carcinoma group presented with metastatic disease, while 11 patients (27%) had regionally advanced disease. All patients with sarcomas presented with localized disease. Of the carcinoma patients, 85% underwent surgical resection, and 10% received adjuvant radiation therapy. Of the sarcoma patients, 97% had surgical resection, and 9% received radiation. The 5- and 10-year survival rates for patients with sarcomatous tumors were both 90%; for patients with carcinomas, the 5-year survival rate was 63% and the 10-year survival rate was 54%.
Treatment of adolescents and young adults
Breast cancer is the most frequently diagnosed cancer among adolescent and young adult (AYA) women aged 15 to 39 years, accounting for about 14% of all AYA cancer diagnoses. Breast cancer in this age group has a more aggressive course and worse outcome than in older women. Expression of hormone receptors for estrogen, progesterone, and human epidermal growth factor 2 (HER2) on breast cancer in the AYA group is also different than in older women and correlates with a worse prognosis. Treatment in the AYA group is similar to that in older women. However, unique aspects of management must include attention to genetic implications (i.e., familial breast cancer syndromes) and fertility.
Female survivors of Hodgkin lymphoma
There is an increased lifetime risk of breast cancer in female survivors of Hodgkin lymphoma who were treated with radiation to the chest area; however, breast cancer is also seen in patients who were treated for any cancer that was treated with chest irradiation. Carcinomas are more frequent than sarcomas. Mammograms with adjunctive breast magnetic resonance imaging (MRI) should start at age 25 years or 10 years postexposure to radiation therapy (whichever came last). (Refer to the PDQ summary on the Late Effects of Treatment for Childhood Cancer for more information about secondary breast cancers.) Breast tumors may also occur as metastatic deposits from leukemia, rhabdomyosarcoma, other sarcomas, or lymphoma (particularly in patients who are infected with the human immunodeficiency virus).
(Refer to the PDQ summary on adult Breast Cancer Treatment for more information.)
Primary lung tumors are rare in children and histologically quite diverse. When epithelial cancers of the lung occur, they tend to be of advanced stage with prognosis dependent on both histology and stage.
The majority of pulmonary malignant neoplasms in children are due to metastatic disease, with an approximate ratio of primary malignant tumors to metastatic disease of 1:5. While primary pulmonary tumors are rare in children, the majority of these tumors are malignant. In a review of 383 primary pulmonary neoplasms in children, 76% were malignant and 24% were benign. These tumors may respond to the ALK inhibitor crizotinib in the presence of ALK translocations.[Level of evidence: 3iiiDiv]
The most common malignant primary tumors of the lung, bronchial tumors and pleuropulmonary blastoma, are discussed below.
Bronchial tumors are a heterogeneous group of primary endobronchial lesions, and although adenoma implies a benign process, all varieties of bronchial tumors on occasion display a malignant behavior. There are three histologic types:
- Carcinoid tumor (most frequent). Carcinoid tumors account for 80% to 85% of all bronchial tumors in children.
- Mucoepidermoid carcinoma.
- Adenoid cystic carcinoma (least frequent).
Clinical presentation and diagnostic evaluation
The presenting symptoms of a cough, recurrent pneumonitis, and hemoptysis are usually due to an incomplete bronchial obstruction. Because of difficulties in diagnosis, symptoms are frequently present for months, and, occasionally, children with wheezing have been treated for asthma with delays in diagnosis as long as 4 to 5 years.
Metastatic lesions are reported in approximately 6% of carcinoid tumors, and recurrences are reported in 2% of cases. Atypical carcinoid tumors are rare but more aggressive with 50% of patients presenting with metastatic disease at diagnosis. There is a single report of a child with a carcinoid tumor and metastatic disease who developed the classic carcinoid syndrome. Octreotide nuclear scans may demonstrate uptake of radioactivity by the tumor or lymph nodes, suggesting metastatic spread.
The management of bronchial tumors is somewhat controversial because bronchial tumors are usually visible endoscopically. Biopsy of these lesions may be hazardous because of hemorrhage, and endoscopic resection is not recommended. Bronchography or computed tomography scan may be helpful to determine the degree of bronchiectasis distal to the obstruction since the degree of pulmonary destruction may influence surgical therapy.
Conservative pulmonary resection, including sleeve segmental resection, when feasible, with the removal of the involved lymphatics, is the treatment of choice. Adenoid cystic carcinomas (cylindroma) have a tendency to spread submucosally, and late local recurrence or dissemination has been reported. In addition to en bloc resection with hilar lymphadenectomy, a frozen section examination of the bronchial margins should be performed in children with this lesion. Neither chemotherapy nor radiation therapy is indicated for bronchial tumors, unless evidence of metastasis is documented.
Types of pleuropulmonary blastoma
Pleuropulmonary blastoma is a rare and highly aggressive pulmonary malignancy in children. Pleuropulmonary blastoma appears to progress through the following stages:
- Type I: A purely lung cystic neoplasm with subtle malignant changes that typically occurs in the first 2 years of life and has a good prognosis. However, there have been reports of Type I transitioning directly to Type III.
- Type II: A cystic and solid neoplasm. Cerebral metastasis may occur in 11% of patients.
- Type III: A purely solid neoplasm. Cerebral metastasis occurs in up to 50% of patients with Type III tumors.
Approximately one-third of families affected by pleuropulmonary blastoma manifest a number of dysplastic and/or neoplastic conditions comprising the Pleuropulmonary Blastoma Family Tumor and Dysplasia Syndrome. Germline mutations in the DICER1 gene are considered the major genetic determinant of the complex. Importantly, while DICER1 mutations cause a wide range of phenotypes, pleuropulmonary blastoma does not occur in all families with DICER1 mutations; therefore, the term DICER1 syndrome is generally used for these families. Also, most mutation carriers are unaffected, indicating that tumor risk is modest.
There has been a reported association between pleuropulmonary blastoma and cystic nephroma, ciliary body medulloepithelioma of the eye, and primary ovarian neoplasms, particularly ovarian sex cord–stromal tumors.
Clinical presentation and diagnostic evaluation
The tumor is usually located in the lung periphery, but it may be extrapulmonary with involvement of the heart/great vessels, mediastinum, diaphragm, and/or pleura. The International Pleuropulmonary Blastoma Registry identified 11 cases of Type II and Type III pleuropulmonary blastoma with tumor extension into the thoracic great vessels or the heart. Radiographic evaluation of the central circulation should be performed in children with suspected or diagnosed pleuropulmonary blastoma to identify potentially fatal embolic complications.
Achieving total resection of the tumor at any time during treatment is associated with improved prognosis. The tumors may recur or metastasize, in spite of primary resection. The cerebral parenchyma is the most common metastatic site.
Responses to chemotherapy have been reported with agents similar to those used for the treatment of rhabdomyosarcoma, and adjuvant chemotherapy may benefit patients with Type I pleuropulmonary blastoma by reducing the risk of recurrence. Chemotherapeutic agents may include vincristine, cyclophosphamide, dactinomycin, doxorubicin, and irinotecan. Data from the International Pleuropulmonary Blastoma Registry suggest that adjuvant chemotherapy may reduce the risk of recurrence.
Radiation, either external beam or P-32, may be used when the tumor cannot be surgically removed.
High-dose chemotherapy with stem cell rescue has been used without success.
There are no standard treatment options. Current treatment regimens have been informed by consensus conferences. The rare occurrence of these tumors makes recommending treatment difficult. Some general treatment considerations from the Pleuropulmonary Blastoma Registry include the following:
- Type I: Surgery alone for select cases; adjuvant chemotherapy may decrease recurrences. Evidence suggests a close histologic relationship between a Type 4 cystic adenomatoid malformation and a Type I pleuropulmonary blastoma. Complete surgical lobectomy is adequate treatment for these patients, but close observation is recommended.
- Type II and Type III: Surgery followed by chemotherapy.
An independent group of researchers has established a registry and resource Web site for this rare tumor.
Incidence and histology
Esophageal cancer is rare in the pediatric age group, although it is relatively common in older adults. Most of these tumors are squamous cell carcinomas, although sarcomas can also arise in the esophagus. The most common benign tumor is leiomyoma.
Clinical presentation and diagnostic evaluation
Symptoms are related to difficulty in swallowing and associated weight loss. Diagnosis is made by histologic examination of biopsy tissue.
Treatment options for esophageal carcinoma include either external-beam intracavitary radiation therapy or chemotherapy agents commonly used to treat carcinomas: platinum derivatives, paclitaxel, and etoposide. Prognosis is generally poor for this cancer, which rarely can be completely resected.
(Refer to the PDQ summary on adult Esophageal Cancer Treatment for more information.)
Thymoma and Thymic Carcinoma
A cancer of the thymus is not considered a thymoma or a thymic carcinoma unless there are neoplastic changes of the epithelial cells that cover the organ. The term thymoma is customarily used to describe neoplasms that show no overt atypia of the epithelial component. Thymic carcinomas have a higher incidence of capsular invasion and metastases. A thymic epithelial tumor that exhibits clear-cut cytologic atypia and histologic features no longer specific to the thymus is known as thymic carcinoma, also known as type C thymoma. Other tumors that involve the thymus gland include lymphomas, germ cell tumors, carcinomas, carcinoids, and thymomas. Hodgkin lymphoma and non-Hodgkin lymphoma may also involve the thymus and must be differentiated from true thymomas and thymic carcinomas.
Incidence and risk factors
Various diseases and syndromes are associated with thymoma, including myasthenia gravis, polymyositis, systemic lupus erythematosus, rheumatoid arthritis, thyroiditis, Isaacs syndrome or neuromyotonia (continuous muscle stiffness resulting from persistent muscle activity as a consequence of antibodies against voltage-gated potassium channels), and pure red-cell aplasia. Endocrine (hormonal) disorders including hyperthyroidism, Addison disease, and panhypopituitarism can also be associated with a diagnosis of thymoma.
These neoplasms are usually located in the anterior mediastinum and are usually discovered during a routine chest x-ray. Symptoms can include cough, difficulty with swallowing, tightness of the chest, chest pain, and shortness of breath, although nonspecific symptoms may occur. These tumors generally are slow growing but are potentially invasive, with metastases to distant organs or lymph nodes. Staging is related to invasiveness.
Surgery is performed with the goal of a complete resection and is the mainstay of therapy.
Radiation therapy is used in patients with invasive thymoma or thymic carcinoma.
Chemotherapy is usually reserved for patients with advanced-stage disease who have not responded to radiation therapy or corticosteroids. Agents that have been effective include doxorubicin, cyclophosphamide, etoposide, cisplatin, ifosfamide, and vincristine. Responses to regimens containing combinations of some of these agents have ranged from 26% to 100% and survival rates have been as high as 50%. Response rates are lower for patients with thymic carcinoma, but 2-year survival rates have been reported to be as high as 50%.
Sunitinib has yielded clinical responses in four patients with adult thymic carcinoma.
The most common primary tumors of the heart are benign. In adults, myxoma is the most common tumor; however, these tumors are rare in children. The most common primary benign heart tumors in children are rhabdomyomas, myxomas, teratomas, and fibromas. Other benign tumors include histiocytoid cardiomyopathy tumors, hemangiomas, and neurofibromas (i.e., tumors of the nerves that innervate the muscles).
Myxomas are the most common noncutaneous finding in Carney complex, a rare syndrome characterized by lentigines, cardiac myxomas or other myxoid fibromas, and endocrine abnormalities. A mutation of the PRKAR1A gene is noted in more than 90% of the cases of Carney complex.
Secondary tumors of the heart include metastatic spread of rhabdomyosarcoma, melanoma, leukemia, and carcinoma of other sites.
The distribution of cardiac tumors in the fetal and neonatal period is different, with more benign teratomas occurring. Multiple cardiac tumors noted in the fetal or neonatal period are highly associated with a diagnosis of tuberous sclerosis. A retrospective review of 94 patients with cardiac tumors detected by prenatal or neonatal echocardiography showed that 68% of the patients exhibited features of tuberous sclerosis. In another study, 79% (15 out of 19) of patients with rhabdomyomas discovered prenatally had tuberous sclerosis, while 96% of those diagnosed postnatally had tuberous sclerosis. Most rhabdomyomas, whether diagnosed prenatally or postnatally, will spontaneously regress.
Clinical presentation and diagnostic evaluation
Patients may be asymptomatic for long periods. Symptoms may include abnormalities of heart rhythm, enlargement of the heart, fluid in the pericardial sac, and congestive heart failure. Some patients present with sudden death.
The utilization of new cardiac MRI techniques can identify the likely tumor type in the majority of children. However, histologic diagnosis remains the standard for diagnosing cardiac tumors.
Incidence and risk factors
This tumor can involve the membranous coverings of the lung, the heart, or the abdominal organs. These tumors can spread over the surface of organs, without invading far into the underlying tissue, and may spread to regional or distant lymph nodes. Mesothelioma may develop after successful treatment of an earlier cancer, especially after treatment with radiation. In adults, these tumors have been associated with exposure to asbestos, which was used as building insulation. The amount of exposure required to develop cancer is unknown, and there is no information about the risk for children exposed to asbestos.
Benign and malignant mesotheliomas cannot be differentiated using histologic criteria. A poor prognosis is associated with lesions that are diffuse and invasive and with those that recur. In general, the course of the disease is slow, and long-term survival is common.
Diagnostic thoracoscopy should be considered in suspicious cases to confirm diagnosis.
Radical surgical resection has been attempted with mixed results. Treatment with various chemotherapeutic agents used for carcinomas or sarcomas may result in partial responses. Pain is an infrequent symptom; however, radiation therapy may be used for palliation of pain.
Papillary serous carcinoma of the peritoneum is sometimes mistaken for mesothelioma. This tumor generally involves all surfaces lining the abdominal organs, including the surfaces of the ovary. Treatment includes surgical resection whenever possible and use of chemotherapy with agents such as cisplatin, carboplatin, and paclitaxel.
(Refer to the PDQ summary on adult Malignant Mesothelioma Treatment for more information.)1Yu DC, Grabowski MJ, Kozakewich HP, et al.: Primary lung tumors in children and adolescents: a 90-year experience. J Pediatr Surg 45 (6): 1090-5, 2010.2Chung EM, Cube R, Hall GJ, et al.: From the archives of the AFIP: breast masses in children and adolescents: radiologic-pathologic correlation. Radiographics 29 (3): 907-31, 2009 May-Jun.3Jayasinghe Y, Simmons PS: Fibroadenomas in adolescence. Curr Opin Obstet Gynecol 21 (5): 402-6, 2009.4Valdes EK, Boolbol SK, Cohen JM, et al.: Malignant transformation of a breast fibroadenoma to cystosarcoma phyllodes: case report and review of the literature. Am Surg 71 (4): 348-53, 2005.5Serour F, Gilad A, Kopolovic J, et al.: Secretory breast cancer in childhood and adolescence: report of a case and review of the literature. Med Pediatr Oncol 20 (4): 341-4, 1992.6Drukker BH: Breast disease: a primer on diagnosis and management. Int J Fertil Womens Med 42 (5): 278-87, 1997 Sep-Oct.7Rogers DA, Lobe TE, Rao BN, et al.: Breast malignancy in children. J Pediatr Surg 29 (1): 48-51, 1994.8Rivera-Hueto F, Hevia-Vázquez A, Utrilla-Alcolea JC, et al.: Long-term prognosis of teenagers with breast cancer. Int J Surg Pathol 10 (4): 273-9, 2002.9Kaste SC, Hudson MM, Jones DJ, et al.: Breast masses in women treated for childhood cancer: incidence and screening guidelines. Cancer 82 (4): 784-92, 1998.10Costa NM, Rodrigues H, Pereira H, et al.: Secretory breast carcinoma--case report and review of the medical literature. Breast 13 (4): 353-5, 2004.11Gutierrez JC, Housri N, Koniaris LG, et al.: Malignant breast cancer in children: a review of 75 patients. J Surg Res 147 (2): 182-8, 2008.12Keegan TH, DeRouen MC, Press DJ, et al.: Occurrence of breast cancer subtypes in adolescent and young adult women. Breast Cancer Res 14 (2): R55, 2012.13Anders CK, Hsu DS, Broadwater G, et al.: Young age at diagnosis correlates with worse prognosis and defines a subset of breast cancers with shared patterns of gene expression. J Clin Oncol 26 (20): 3324-30, 2008.14Gabriel CA, Domchek SM: Breast cancer in young women. Breast Cancer Res 12 (5): 212, 2010.15Metayer C, Lynch CF, Clarke EA, et al.: Second cancers among long-term survivors of Hodgkin's disease diagnosed in childhood and adolescence. J Clin Oncol 18 (12): 2435-43, 2000.16Swerdlow AJ, Barber JA, Hudson GV, et al.: Risk of second malignancy after Hodgkin's disease in a collaborative British cohort: the relation to age at treatment. J Clin Oncol 18 (3): 498-509, 2000.17van Leeuwen FE, Klokman WJ, Veer MB, et al.: Long-term risk of second malignancy in survivors of Hodgkin's disease treated during adolescence or young adulthood. J Clin Oncol 18 (3): 487-97, 2000.18Henderson TO, Amsterdam A, Bhatia S, et al.: Systematic review: surveillance for breast cancer in women treated with chest radiation for childhood, adolescent, or young adult cancer. Ann Intern Med 152 (7): 444-55; W144-54, 2010.19Lal DR, Clark I, Shalkow J, et al.: Primary epithelial lung malignancies in the pediatric population. Pediatr Blood Cancer 45 (5): 683-6, 2005.20Weldon CB, Shamberger RC: Pediatric pulmonary tumors: primary and metastatic. Semin Pediatr Surg 17 (1): 17-29, 2008.21Hancock BJ, Di Lorenzo M, Youssef S, et al.: Childhood primary pulmonary neoplasms. J Pediatr Surg 28 (9): 1133-6, 1993.22Kim SJ, Kim DW, Kim TM, et al.: Remarkable tumor response to crizotinib in a 14-year-old girl with ALK-positive non-small-cell lung cancer. J Clin Oncol 30 (16): e147-50, 2012.23Vadasz P, Palffy G, Egervary M, et al.: Diagnosis and treatment of bronchial carcinoid tumors: clinical and pathological review of 120 operated patients. Eur J Cardiothorac Surg 7 (1): 8-11, 1993.24Kulke MH, Mayer RJ: Carcinoid tumors. N Engl J Med 340 (11): 858-68, 1999.25Oliaro A, Filosso PL, Donati G, et al.: Atypical bronchial carcinoids. Review of 46 patients. J Cardiovasc Surg (Torino) 41 (1): 131-5, 2000.26Moraes TJ, Langer JC, Forte V, et al.: Pediatric pulmonary carcinoid: a case report and review of the literature. Pediatr Pulmonol 35 (4): 318-22, 2003.27Al-Qahtani AR, Di Lorenzo M, Yazbeck S: Endobronchial tumors in children: Institutional experience and literature review. J Pediatr Surg 38 (5): 733-6, 2003.28Roby BB, Drehner D, Sidman JD: Pediatric tracheal and endobronchial tumors: an institutional experience. Arch Otolaryngol Head Neck Surg 137 (9): 925-9, 2011.29Soga J, Yakuwa Y: Bronchopulmonary carcinoids: An analysis of 1,875 reported cases with special reference to a comparison between typical carcinoids and atypical varieties. Ann Thorac Cardiovasc Surg 5 (4): 211-9, 1999.30Fauroux B, Aynie V, Larroquet M, et al.: Carcinoid and mucoepidermoid bronchial tumours in children. Eur J Pediatr 164 (12): 748-52, 2005.31Abuzetun JY, Hazin R, Suker M, et al.: Primary squamous cell carcinoma of the lung with bony metastasis in a 13-year-old boy: case report and review of literature. J Pediatr Hematol Oncol 30 (8): 635-7, 2008.32Rizzardi G, Marulli G, Calabrese F, et al.: Bronchial carcinoid tumours in children: surgical treatment and outcome in a single institution. Eur J Pediatr Surg 19 (4): 228-31, 2009.33Lack EE, Harris GB, Eraklis AJ, et al.: Primary bronchial tumors in childhood. A clinicopathologic study of six cases. Cancer 51 (3): 492-7, 1983.34Ahel V, Zubovic I, Rozmanic V: Bronchial adenoid cystic carcinoma with saccular bronchiectasis as a cause of recurrent pneumonia in children. Pediatr Pulmonol 12 (4): 260-2, 1992.35Gaissert HA, Mathisen DJ, Grillo HC, et al.: Tracheobronchial sleeve resection in children and adolescents. J Pediatr Surg 29 (2): 192-7; discussion 197-8, 1994.36Jalal A, Jeyasingham K: Bronchoplasty for malignant and benign conditions: a retrospective study of 44 cases. Eur J Cardiothorac Surg 17 (4): 370-6, 2000.37Shivastava R, Saha A, Mehera B, et al.: Pleuropulmonary blastoma: transition from type I (cystic) to type III (solid). Singapore Med J 48 (7): e190-2, 2007.38Hill DA, Jarzembowski JA, Priest JR, et al.: Type I pleuropulmonary blastoma: pathology and biology study of 51 cases from the international pleuropulmonary blastoma registry. Am J Surg Pathol 32 (2): 282-95, 2008.39Priest JR, Magnuson J, Williams GM, et al.: Cerebral metastasis and other central nervous system complications of pleuropulmonary blastoma. Pediatr Blood Cancer 49 (3): 266-73, 2007.40Priest JR, Hill DA, Williams GM, et al.: Type I pleuropulmonary blastoma: a report from the International Pleuropulmonary Blastoma Registry. J Clin Oncol 24 (27): 4492-8, 2006.41Miniati DN, Chintagumpala M, Langston C, et al.: Prenatal presentation and outcome of children with pleuropulmonary blastoma. J Pediatr Surg 41 (1): 66-71, 2006.42Hill DA, Ivanovich J, Priest JR, et al.: DICER1 mutations in familial pleuropulmonary blastoma. Science 325 (5943): 965, 2009.43Slade I, Bacchelli C, Davies H, et al.: DICER1 syndrome: clarifying the diagnosis, clinical features and management implications of a pleiotropic tumour predisposition syndrome. J Med Genet 48 (4): 273-8, 2011.44Priest JR, McDermott MB, Bhatia S, et al.: Pleuropulmonary blastoma: a clinicopathologic study of 50 cases. Cancer 80 (1): 147-61, 1997.45Cross SF, Arbuckle S, Priest JR, et al.: Familial pleuropulmonary blastoma in Australia. Pediatr Blood Cancer 55 (7): 1417-9, 2010.46Gutweiler JR, Labelle J, Suh MY, et al.: A familial case of pleuropulmonary blastoma. Eur J Pediatr Surg 18 (3): 192-4, 2008.47Bouron-Dal Soglio D, Harvey I, Yazbeck S, et al.: An association of pleuropulmonary blastoma and cystic nephroma: possible genetic association. Pediatr Dev Pathol 9 (1): 61-4, 2006 Jan-Feb.48Boman F, Hill DA, Williams GM, et al.: Familial association of pleuropulmonary blastoma with cystic nephroma and other renal tumors: a report from the International Pleuropulmonary Blastoma Registry. J Pediatr 149 (6): 850-854, 2006.49Priest JR, Williams GM, Manera R, et al.: Ciliary body medulloepithelioma: four cases associated with pleuropulmonary blastoma--a report from the International Pleuropulmonary Blastoma Registry. Br J Ophthalmol 95 (7): 1001-5, 2011.50Schultz KA, Pacheco MC, Yang J, et al.: Ovarian sex cord-stromal tumors, pleuropulmonary blastoma and DICER1 mutations: a report from the International Pleuropulmonary Blastoma Registry. Gynecol Oncol 122 (2): 246-50, 2011.51Indolfi P, Casale F, Carli M, et al.: Pleuropulmonary blastoma: management and prognosis of 11 cases. Cancer 89 (6): 1396-401, 2000.52Indolfi P, Bisogno G, Casale F, et al.: Prognostic factors in pleuro-pulmonary blastoma. Pediatr Blood Cancer 48 (3): 318-23, 2007.53Priest JR, Andic D, Arbuckle S, et al.: Great vessel/cardiac extension and tumor embolism in pleuropulmonary blastoma: a report from the International Pleuropulmonary Blastoma Registry. Pediatr Blood Cancer 56 (4): 604-9, 2011.54Schmaltz C, Sauter S, Opitz O, et al.: Pleuro-pulmonary blastoma: a case report and review of the literature. Med Pediatr Oncol 25 (6): 479-84, 1995.55Ohta Y, Fujishima M, Hasegawa H, et al.: High therapeutic effectiveness of postoperative irinotecan chemotherapy in a typical case of radiographically and pathologically diagnosed pleuropulmonary blastoma. J Pediatr Hematol Oncol 31 (5): 355-8, 2009.56Venkatramani R, Malogolowkin MH, Wang L, et al.: Pleuropulmonary blastoma: a single-institution experience. J Pediatr Hematol Oncol 34 (5): e182-5, 2012.57de Castro CG Jr, de Almeida SG, Gregianin LJ, et al.: High-dose chemotherapy and autologous peripheral blood stem cell rescue in a patient with pleuropulmonary blastoma. J Pediatr Hematol Oncol 25 (1): 78-81, 2003.58Pleuropulmonary Blastoma Registry. St. Paul, Minn: Children's Hospitals and Clinics of St. Paul. Available online. Last accessed April 04, 2013.59MacSweeney F, Papagiannopoulos K, Goldstraw P, et al.: An assessment of the expanded classification of congenital cystic adenomatoid malformations and their relationship to malignant transformation. Am J Surg Pathol 27 (8): 1139-46, 2003.60Hill DA, Dehner LP: A cautionary note about congenital cystic adenomatoid malformation (CCAM) type 4. Am J Surg Pathol 28 (4): 554-5; author reply 555, 2004.61Gangopadhyay AN, Mohanty PK, Gopal SC, et al.: Adenocarcinoma of the esophagus in an 8-year-old boy. J Pediatr Surg 32 (8): 1259-60, 1997.62Issaivanan M, Redner A, Weinstein T, et al.: Esophageal carcinoma in children and adolescents. J Pediatr Hematol Oncol 34 (1): 63-7, 2012.63Verley JM, Hollmann KH: Thymoma. A comparative study of clinical stages, histologic features, and survival in 200 cases. Cancer 55 (5): 1074-86, 1985.64Hsueh C, Kuo TT, Tsang NM, et al.: Thymic lymphoepitheliomalike carcinoma in children: clinicopathologic features and molecular analysis. J Pediatr Hematol Oncol 28 (12): 785-90, 2006.65Stachowicz-Stencel T, Bien E, Balcerska A, et al.: Thymic carcinoma in children: a report from the Polish Pediatric Rare Tumors Study. Pediatr Blood Cancer 54 (7): 916-20, 2010.66Furman WL, Buckley PJ, Green AA, et al.: Thymoma and myasthenia gravis in a 4-year-old child. Case report and review of the literature. Cancer 56 (11): 2703-6, 1985.67Yaris N, Nas Y, Cobanoglu U, et al.: Thymic carcinoma in children. Pediatr Blood Cancer 47 (2): 224-7, 2006.68Yalçin B, Demir HA, Ciftçi AO, et al.: Thymomas in childhood: 11 cases from a single institution. J Pediatr Hematol Oncol 34 (8): 601-5, 2012.69Carretto E, Inserra A, Ferrari A, et al.: Epithelial thymic tumours in paediatric age: a report from the TREP project. Orphanet J Rare Dis 6: 28, 2011.70Souadjian JV, Enriquez P, Silverstein MN, et al.: The spectrum of diseases associated with thymoma. Coincidence or syndrome? Arch Intern Med 134 (2): 374-9, 1974.71Coulter D, Gold S: Thymoma in the offspring of a patient with Isaacs syndrome. J Pediatr Hematol Oncol 29 (11): 797-8, 2007.72Cowen D, Richaud P, Mornex F, et al.: Thymoma: results of a multicentric retrospective series of 149 non-metastatic irradiated patients and review of the literature. FNCLCC trialists. Fédération Nationale des Centres de Lutte Contre le Cancer. Radiother Oncol 34 (1): 9-16, 1995.73Carlson RW, Dorfman RF, Sikic BI: Successful treatment of metastatic thymic carcinoma with cisplatin, vinblastine, bleomycin, and etoposide chemotherapy. Cancer 66 (10): 2092-4, 1990.74Niehues T, Harms D, Jürgens H, et al.: Treatment of pediatric malignant thymoma: long-term remission in a 14-year-old boy with EBV-associated thymic carcinoma by aggressive, combined modality treatment. Med Pediatr Oncol 26 (6): 419-24, 1996.75Casey EM, Kiel PJ, Loehrer PJ Sr: Clinical management of thymoma patients. Hematol Oncol Clin North Am 22 (3): 457-73, 2008.76Giaccone G, Ardizzoni A, Kirkpatrick A, et al.: Cisplatin and etoposide combination chemotherapy for locally advanced or metastatic thymoma. A phase II study of the European Organization for Research and Treatment of Cancer Lung Cancer Cooperative Group. J Clin Oncol 14 (3): 814-20, 1996.77Loehrer PJ Sr, Jiroutek M, Aisner S, et al.: Combined etoposide, ifosfamide, and cisplatin in the treatment of patients with advanced thymoma and thymic carcinoma: an intergroup trial. Cancer 91 (11): 2010-5, 2001.78Ströbel P, Bargou R, Wolff A, et al.: Sunitinib in metastatic thymic carcinomas: laboratory findings and initial clinical experience. Br J Cancer 103 (2): 196-200, 2010.79Wu KH, Mo XM, Liu YL: Clinical analysis and surgical results of cardiac myxoma in pediatric patients. J Surg Oncol 99 (1): 48-50, 2009.80Burke A, Virmani R: Pediatric heart tumors. Cardiovasc Pathol 17 (4): 193-8, 2008 Jul-Aug.81Becker AE: Primary heart tumors in the pediatric age group: a review of salient pathologic features relevant for clinicians. Pediatr Cardiol 21 (4): 317-23, 2000 Jul-Aug.82Padalino MA, Vida VL, Boccuzzo G, et al.: Surgery for primary cardiac tumors in children: early and late results in a multicenter European Congenital Heart Surgeons Association study. Circulation 126 (1): 22-30, 2012.83Isaacs H Jr: Fetal and neonatal cardiac tumors. Pediatr Cardiol 25 (3): 252-73, 2004 May-Jun.84Elderkin RA, Radford DJ: Primary cardiac tumours in a paediatric population. J Paediatr Child Health 38 (2): 173-7, 2002.85Uzun O, Wilson DG, Vujanic GM, et al.: Cardiac tumours in children. Orphanet J Rare Dis 2: 11, 2007.86Bruce CJ: Cardiac tumours: diagnosis and management. Heart 97 (2): 151-60, 2011.87Boikos SA, Stratakis CA: Carney complex: the first 20 years. Curr Opin Oncol 19 (1): 24-9, 2007.88Carney JA, Young WF: Primary pigmented nodular adrenocortical disease and its associated conditions. Endocrinologist 2: 6-21, 1992.89Stratakis CA, Kirschner LS, Carney JA: Clinical and molecular features of the Carney complex: diagnostic criteria and recommendations for patient evaluation. J Clin Endocrinol Metab 86 (9): 4041-6, 2001.90Boikos SA, Stratakis CA: Carney complex: pathology and molecular genetics. Neuroendocrinology 83 (3-4): 189-99, 2006.91Kogon B, Shehata B, Katzenstein H, et al.: Primary congenital infantile fibrosarcoma of the heart: the first confirmed case. Ann Thorac Surg 91 (4): 1276-80, 2011.92Tworetzky W, McElhinney DB, Margossian R, et al.: Association between cardiac tumors and tuberous sclerosis in the fetus and neonate. Am J Cardiol 92 (4): 487-9, 2003.93Bader RS, Chitayat D, Kelly E, et al.: Fetal rhabdomyoma: prenatal diagnosis, clinical outcome, and incidence of associated tuberous sclerosis complex. J Pediatr 143 (5): 620-4, 2003.94Beroukhim RS, Prakash A, Buechel ER, et al.: Characterization of cardiac tumors in children by cardiovascular magnetic resonance imaging: a multicenter experience. J Am Coll Cardiol 58 (10): 1044-54, 2011.95Michler RE, Goldstein DJ: Treatment of cardiac tumors by orthotopic cardiac transplantation. Semin Oncol 24 (5): 534-9, 1997.96Stiller B, Hetzer R, Meyer R, et al.: Primary cardiac tumours: when is surgery necessary? Eur J Cardiothorac Surg 20 (5): 1002-6, 2001.97Günther T, Schreiber C, Noebauer C, et al.: Treatment strategies for pediatric patients with primary cardiac and pericardial tumors: a 30-year review. Pediatr Cardiol 29 (6): 1071-6, 2008.98Nagata S, Nakanishi R: Malignant pleural mesothelioma with cavity formation in a 16-year-old boy. Chest 127 (2): 655-7, 2005.99Rosas-Salazar C, Gunawardena SW, Spahr JE: Malignant pleural mesothelioma in a child with ataxia-telangiectasia. Pediatr Pulmonol 48 (1): 94-7, 2013.100Kelsey A: Mesothelioma in childhood. Pediatr Hematol Oncol 11 (5): 461-2, 1994 Sep-Oct.101Moran CA, Albores-Saavedra J, Suster S: Primary peritoneal mesotheliomas in children: a clinicopathological and immunohistochemical study of eight cases. Histopathology 52 (7): 824-30, 2008.102Cioffredi LA, Jänne PA, Jackman DM: Treatment of peritoneal mesothelioma in pediatric patients. Pediatr Blood Cancer 52 (1): 127-9, 2009.103Hofmann J, Mintzer D, Warhol MJ: Malignant mesothelioma following radiation therapy. Am J Med 97 (4): 379-82, 1994.104Pappo AS, Santana VM, Furman WL, et al.: Post-irradiation malignant mesothelioma. Cancer 79 (1): 192-3, 1997.105Hyers TM, Ohar JM, Crim C: Clinical controversies in asbestos-induced lung diseases. Semin Diagn Pathol 9 (2): 97-101, 1992.106Maziak DE, Gagliardi A, Haynes AE, et al.: Surgical management of malignant pleural mesothelioma: a systematic review and evidence summary. Lung Cancer 48 (2): 157-69, 2005.107Milano E, Pourroy B, Rome A, et al.: Efficacy of a combination of pemetrexed and multiple redo-surgery in an 11-year-old girl with a recurrent multifocal abdominal mesothelioma. Anticancer Drugs 17 (10): 1231-4, 2006.108Wall JE, Mandrell BN, Jenkins JJ 3rd, et al.: Effectiveness of paclitaxel in treating papillary serous carcinoma of the peritoneum in an adolescent. Am J Obstet Gynecol 172 (3): 1049-52, 1995.
Abdominal cancers include adrenocortical tumors, carcinomas of the stomach, cancer of the pancreas, colorectal carcinomas, carcinoid tumors, and gastrointestinal stromal tumors. The prognosis, diagnosis, classification, and treatment of these abdominal cancers are discussed below. It must be emphasized that these cancers are seen very infrequently in patients younger than 15 years, and most of the evidence is derived from case series. (Refer to the Renal Cell Carcinoma section in the PDQ summary on Wilms Tumor and Other Childhood Kidney Tumors for more information.)
Carcinoma of the Adrenal Cortex
Adrenocortical tumors encompass a spectrum of diseases with often seamless transition from benign (adenoma) to malignant (carcinoma) behavior. Their incidence in children is extremely low (only 0.2% of pediatric cancers). Adrenocortical tumors appear to follow a bimodal distribution, with peaks during the first and fourth decades. In children, 25 new cases are expected to occur annually in the United States, for an estimated annual incidence of 0.2 to 0.3 cases per 1 million. Internationally, however, the incidence of adrenocortical tumors appear to vary substantially. The incidence of adrenocortical tumors is particularly high in southern Brazil, where it is approximately 10 to 15 times that observed in the United States. Childhood adrenocortical tumors typically present during the first 5 years of life (median age, 3–4 years), although there is a second, smaller peak during adolescence. Female gender is consistently predominant in most studies, with a female to male ratio of 1.6 to 1.
Predisposing genetic factors have been implicated in more than 50% of the cases in North America and Europe, and in 95% of the Brazilian cases. Germline TP53 mutations are almost always the predisposing factor. In the non-Brazilian cases, relatives of children with adrenocortical tumors often, although not invariably, have a high incidence of other non-adrenal cancers (Li-Fraumeni syndrome); germline mutations usually occur within the region coding for the TP53 DNA-binding domain (exons 5 to 8, primarily at highly conserved amino acid residues). In the Brazilian cases, in contrast, the patients’ families do not exhibit a high incidence of cancer, and a single, unique mutation at codon 337 in exon 10 of the TP53 gene is consistently observed. Patients with Beckwith-Wiedemann and hemihypertrophy syndromes have a predisposition to cancer, and as many as 16% of their neoplasms are adrenocortical tumors. Hypomethylation of the KCNQ1OT1 gene has also been associated with the development of adrenocortical tumors in patients without the phenotypic features of Beckwith-Wiedemann syndrome. However, less than 1% of children with adrenocortical tumors have these syndromes. The distinctive genetic features of pediatric adrenocortical carcinoma have been reviewed.
Unlike adult adrenocortical tumors, histologic differentiation of adenomas and carcinomas is difficult. However, approximately 10% to 20% of pediatric cases are adenomas. The distinction between benign (adenomas) and malignant (carcinomas) tumors can be problematic. In fact, adenoma and carcinoma appear to share multiple genetic aberrations and may represent points on a continuum of cellular transformation. Macroscopically, adenomas tend to be well defined and spherical, and they never invade surrounding structures. They are typically small (usually <200 cm3), and some studies have included size as a criterion for adenoma. By contrast, carcinomas have macroscopic features suggestive of malignancy; they are larger, and they show marked lobulation with extensive areas of hemorrhage and necrosis. Microscopically, carcinomas comprise larger cells with eosinophilic cytoplasm, arranged in alveolar clusters. Several authors have proposed histologic criteria that may help to distinguish the two types of neoplasm. However, morphologic criteria may not allow reliable distinction of benign and malignant adrenocortical tumors. Mitotic rate is consistently reported as the most important determinant of aggressive behavior. IGF2 expression also appears to discriminate between carcinomas and adenomas in adults, but not in children. Other histopathologic variables are also important, and risk groups may be identified on the basis of a score derived from characteristics, such as venous, capsular, or adjacent organ invasion; tumor necrosis; mitotic rate; and the presence of atypical mitoses.
Because pediatric adrenocortical tumors are almost universally functional, they cause endocrine disturbances, and a diagnosis is usually made 5 to 8 months after the first signs and symptoms emerge. Virilization (pubic hair, accelerated growth, enlarged penis, clitoromegaly, hirsutism, and acne) due to excess of androgen secretion is seen, alone or in combination with hypercortisolism, in more than 80% of patients. Isolated Cushing syndrome is very rare (5% of patients), and it appears to occur more frequently in older children. Likewise, nonfunctional tumors are rare (<10%) and tend to occur in older children. Because of the hormone hypersecretion, it is possible to establish an endocrine profile for each particular tumor, which may facilitate the evaluation of response to treatment and monitor for tumor recurrence.
In patients with localized disease, age between 0 and 3 years, virilization alone, normal blood pressure, disease stage I, absence of spillage during surgery, and tumor weight no greater than 200 grams were associated with a greater probability of survival. In a Cox regression model analysis, only stage I, virilization alone, and age 0 to 3 years were independently associated with a better outcome. Available data suggest that tumor size is especially important in children; patients with small tumors have an excellent outcome with surgery alone, regardless of histologic features. The overall probability of 5-year survival for children with adrenocortical tumors is reported to be 54% to 74%.
Treatment of adrenocortical tumors
At the time of diagnosis, two-thirds of pediatric patients have limited disease (tumors can be completely resected), and the remaining patients have either unresectable or metastatic disease.
Treatment of childhood adrenocortical tumors has evolved from the data derived from the adult studies, and the same guidelines are used; surgery is the most important mode of therapy, and mitotane and cisplatin-based regimens, usually incorporating doxorubicin and etoposide, are recommended for patients with advanced disease. An aggressive surgical approach of the primary tumor and all metastatic sites is recommended when feasible. Because of tumor friability, rupture of the capsule with resultant tumor spillage is frequent (approximately 20% of initial resections and 43% of resections after recurrence). When the diagnosis of adrenocortical tumor is suspected, laparotomy and a curative procedure are recommended rather than fine-needle aspiration, to avoid the risk of tumor rupture. Laparoscopic resection is associated with a high risk of rupture and peritoneal carcinomatosis; thus, open adrenalectomy remains the standard of care.
Little information is available about the use of mitotane in children, although response rates appear to be similar to those seen in adults. A retrospective analysis in Italy and Germany identified 177 adult patients with adrenocortical carcinoma. Recurrence-free survival was significantly prolonged by the use of adjuvant mitotane. Benefit was present with 1 to 3 g per day of mitotane and was associated with fewer toxic side effects than doses of 3 to 5 g per day. In a review of 11 children with advanced adrenocortical tumors treated with mitotane and a cisplatin-based chemotherapeutic regimen, measurable responses were seen in seven patients. The mitotane daily dose required for therapeutic levels was around 4 g/m2, and therapeutic levels were achieved after 4 to 6 months of therapy.
The use of radiation therapy in pediatric patients with adrenocortical tumors has not been consistently investigated. Adrenocortical tumors are generally considered to be radioresistant. Furthermore, because many children with adrenocortical tumors carry germline TP53 mutations that predispose to cancer, radiation may increase the incidence of secondary tumors. One study reported three of five long-term survivors of pediatric adrenocortical tumors died of secondary sarcoma that arose within the radiation field.
(Refer to the PDQ summary on adult Adrenocortical Carcinoma Treatment for more information.)
Treatment options under clinical evaluation
The following is an example of a national and/or institutional clinical trial that is currently being conducted. Information about ongoing clinical trials is available from the NCI Web site.
- COG-ARAR0332 (Cisplatin-Based Chemotherapy and/or Surgery in Treating Young Patients With Adrenocortical Tumor): This Children's Oncology Group trial is evaluating the treatment of adrenocortical tumors with surgery and lymph node dissection. Patients with advanced disease will receive multiagent chemotherapy. Patients with stage I or stage II disease will have resection and retroperitoneal lymph node sampling (stage I) or dissection (stage II). Patients with stage III and stage IV disease will receive chemotherapy before resection. The chemotherapy regimen is cisplatin, doxorubicin, etoposide, and oral mitotane.
Carcinoma of the Stomach
Primary gastric tumors in children are rare, and carcinoma of the stomach is even more unusual. In one series, gastric cancer in children younger than 18 years accounted for 0.11% of all gastric cancer cases seen over an 18-year period. The frequency and death rate from stomach cancer has declined worldwide for the past 50 years with the introduction of food preservation practices such as refrigeration.
The tumor must be distinguished from other conditions such as non-Hodgkin lymphoma, malignant carcinoid, leiomyosarcoma, and various benign conditions or tumors of the stomach. Symptoms include vague upper abdominal pain, which can be associated with poor appetite and weight loss. Other symptoms may include nausea, vomiting, change in bowel habits, poor appetite, weakness, and Helicobacter pylori infection. Many individuals become anemic but otherwise show no symptoms before the development of metastatic spread. Fiberoptic endoscopy can be used to visualize the tumor or to take a biopsy sample to confirm the diagnosis. Confirmation can also involve an x-ray examination of the upper gastrointestinal tract.
Treatment should include surgical excision with wide margins. For individuals who cannot have a complete surgical resection, radiation therapy may be used along with chemotherapeutic agents such as fluorouracil (5-FU) and irinotecan. Other agents that may be of value are the nitrosoureas with or without cisplatin, etoposide, doxorubicin, or mitomycin C.
Prognosis depends on the extent of the disease at the time of diagnosis and the success of treatment that is appropriate for the clinical situation. Because of the rarity of stomach cancer in the pediatric age group, little information exists regarding the treatment outcomes of children.
(Refer to the PDQ summary on adult Gastric Cancer Treatment for more information.)
Cancer of the Pancreas
Malignant pancreatic tumors are rare in children and adolescents with an incidence of 0.46 cases per 1 million (younger than 30 years). Tumors included in this general category can arise at any site within the pancreas. Cancers of the pancreas may be classified as adenocarcinomas, squamous cell carcinomas, acinic cell carcinomas, liposarcomas, lymphomas, papillary-cystic carcinomas, pancreatoblastomas, malignant insulinomas, glucagonomas, and gastrinomas. Several cases of primitive neuroectodermal tumor of the pancreas have been reported in children and young adults. Pancreatoblastoma is reported to be associated with Beckwith-Wiedemann syndrome and Cushing syndrome.
Most malignant pancreatic tumors are carcinomas and do not secrete hormones, although some tumors secrete insulin, which can lead to symptoms of weakness, fatigue, hypoglycemia, and coma. If the tumor interferes with the normal function of the islet cells, patients may have watery diarrhea or abnormalities of salt balance. Both carcinoma of the pancreas and pancreatoblastoma can produce active hormones and can be associated with an abdominal mass, wasting, and pain. At times, there is obstruction of the head of the pancreas, which is associated with jaundice and gastrointestinal bleeding. Elevation of alpha-fetoprotein has been seen in pancreatoblastoma and acinar cell carcinoma.
Diagnosis of pancreatic tumors is usually established by biopsy, using laparotomy or a minimally invasive surgery (e.g., laparoscopy). A diagnosis can be achieved only after ruling out various benign and cancerous lesions.
Solid pseudopapillary neoplasm of the pancreas is a rare tumor of borderline malignancy that has been reported in children but more commonly occurs in young women. Treatment consists of complete tumor resection (ideally without biopsy). Metastases may occur, but in general, prognosis is good following surgery alone.; [Level of evidence: 3iiA]; [Level of evidence: 3iiDi]; [Level of evidence: 3iiDiii]
Treatment includes various surgical procedures to remove the pancreas and duodenum or removal of part of the pancreas. Complete resection is usually possible and long-term survival is likely, although pancreatoblastoma has a high recurrence rate.; [Level of evidence: 3iiA] For pediatric patients, the effectiveness of radiation therapy is not known. Chemotherapy may be useful for treatment of localized or metastatic pancreatic carcinoma. The combination of cisplatin and doxorubicin has produced responses in pancreatoblastoma prior to tumor resection. Postoperative treatment with cisplatin, doxorubicin, ifosfamide, and etoposide has also produced responses in patients with pancreatoblastoma, although surgery is the mainstay of therapy.; [Level of evidence: 3iiiA] Other agents that may be of value include 5-FU, streptozotocin, mitomycin C, carboplatin, gemcitabine, and irinotecan. Response rates and survival rates generally are not good.
(Refer to the PDQ summary on adult Pancreatic Cancer Treatment for more information.)
Carcinoma of the large bowel is rare in the pediatric age group. It is seen in one per 1 million persons younger than 20 years in the United States annually, and fewer than 100 cases are diagnosed in children each year in the United States. From 1973 to 2006, the SEER database recorded 174 cases of colorectal cancer in patients younger than 19 years.
In children, 40% to 60% of tumors arise on the right side of the colon, in contrast to adults who have a prevalence of tumors on the left side. Most reports also suggest that children present with more advanced disease and have a worse outcome.
Most tumors in the pediatric age group are poorly differentiated mucin-producing carcinomas and many are of the signet ring cell type, whereas only about 15% of adult lesions are of this histology. The tumors of younger patients with this histologic variant may be less responsive to chemotherapy. In the adolescent and young adult population, colorectal cancers have a higher incidence of mucinous histology, signet ring cells, microsatellite instability, and mutations in the mismatch repair genes. These tumors arise from the surface of the bowel, usually at the site of an adenomatous polyp. The tumor may extend into the muscle layer surrounding the bowel, or the tumor may perforate the bowel entirely and seed through the spaces around the bowel, including intra-abdominal fat, lymph nodes, liver, ovaries, and the surface of other loops of bowel. A high incidence of metastasis involving the pelvis, ovaries, or both may be present in girls. Colorectal cancers in younger patients have a high incidence of microsatellite instability, and noninherited sporadic tumors in younger patients often lack KRAS mutations and other cytogenetic anomalies seen in older patients.
Genetic syndromes associated with colorectal cancer
About 20% to 30% of adult patients with colorectal cancer have a significant history of familial cancer; of these, about 5% have a well-defined genetic syndrome. The incidence of these syndromes in children has not been well defined. In one review, 16% of patients younger than 40 years had a predisposing factor for the development of colorectal cancer. A later study documented immunohistochemical evidence of mismatch repair deficiency in 31% of colorectal carcinoma samples in patients aged 30 years or younger. The most common genetic syndromes associated with the development of colorectal cancer are shown in Tables 3 and 4.Table 3. Common Genetic Syndromes Associated With Adenomatous PolyposisSyndrome GeneGene FunctionHereditary PatternAttenuated familial adenomatous polyposis APC (5’ mutations), AXIN2 Tumor suppressor DominantFamilial adenomatous polyposis (Gardner syndrome) APCTumor suppressor DominantLynch syndrome (hereditary nonpolyposis colorectal cancer) MSH2, MLH1, MSH6, PMS2, EPCAMRepair/stabilityDominantLi-Fraumeni syndrome TP53 (p53)Tumor suppressor DominantMYH-associated polyposis MYH (MUTYH) Repair/stability RecessiveTurcot syndromeAPC Tumor suppressor DominantMLH1 Repair/stability DominantTable 4. Common Genetic Syndromes Associated With Hamartomatous PolypsSyndromeGeneGene FunctionHereditary PatternCowden syndrome PTEN Tumor suppressor DominantJuvenile polyposis syndrome BMPR1A, SMAD4, ENGTumor suppressorDominantPeutz-Jeghers syndromeSTK11Tumor suppressor Dominant
Familial polyposis is inherited as a dominant trait, which confers a high degree of risk. Early diagnosis and surgical removal of the colon eliminates the risk of developing carcinomas of the large bowel. Some colorectal carcinomas in young people, however, may be associated with a mutation of the adenomatous polyposis coli (APC) gene, which also is associated with an increased risk of brain tumors and hepatoblastoma. The familial APC syndrome is caused by mutation of a gene on chromosome 5q, which normally suppresses proliferation of cells lining the intestine and later development of polyps. A double-blind, placebo-controlled, randomized phase I trial in children aged 10 to 14 years with familial adenomatous polyposis (FAP) reported that celecoxib at a dose of 16 mg/kg/day is safe for administration for up to 3 months. At this dose, there was a significant decrease in the number of polyps detected on colonoscopy.[Level of evidence: 1iiDiv] The role of celecoxib in the management of FAP is not known.
Another tumor suppressor gene on chromosome 18 is associated with progression of polyps to malignant form. Multiple colon carcinomas have been associated with neurofibromatosis type I and several other rare syndromes.
Presenting symptoms are nonspecific and include abdominal pain, weight loss, change in bowel habits, anemia, and bleeding; the median duration of symptoms was about 3 months in one series. Changes in bowel habits may be associated with tumors of the rectum or lower colon. Tumors of the right colon may cause more subtle symptoms but are often associated with an abdominal mass, weight loss, decreased appetite, and blood in the stool. Any tumor that causes complete obstruction of the large bowel can cause bowel perforation and spread of the tumor cells within the abdominal cavity.
Diagnostic studies that may be of value include examination of the stool for blood, studies of liver and kidney function, measurement of carcinoembryonic antigen, and various medical imaging studies, including direct examination using colonoscopy to detect polyps in the large bowel. Other conventional radiographic studies include barium enema or video-capsule endoscopy followed by computed tomography of the chest and bone scans.
Most patients present with evidence of metastatic disease, either as gross tumor or as microscopic deposits in lymph nodes, on the surface of the bowel, or on intra-abdominal organs. Complete surgical excision is the most important prognostic factor and should be the primary aim of the surgeon, but in most instances this is impossible; removal of large portions of tumor provides little benefit for the individuals with extensive metastatic disease. Most patients with microscopic metastatic disease generally develop gross metastatic disease, and few individuals with metastatic disease at diagnosis become long-term survivors.
Current therapy includes the use of radiation for rectal and lower colon tumors, in conjunction with chemotherapy using 5-FU with leucovorin. Other agents, including irinotecan, may be of value.[Level of evidence: 3iiiA] No significant benefit has been determined for interferon-alpha given in conjunction with 5-FU/leucovorin. A recent review of nine clinical trials comprising 138 patients younger than 40 years demonstrated that the use of combination chemotherapy improved progression-free and overall survival (OS) in these patients. Furthermore, OS and response rates to chemotherapy were similar to those observed in older patients.
(Refer to the PDQ summaries on adult Colon Cancer Treatment and Rectal Cancer Treatment for more information.)
These tumors, like bronchial adenomas, may be benign or malignant and can involve the lining of the lung, large or small bowel, or liver. Most lung lesions are benign; however, some metastasize.
Most carcinoid tumors of the appendix are discovered incidentally at the time of appendectomy, and are small, localized tumors; simple appendectomy is the therapy of choice. For larger (>2 cm) tumors or tumors that have spread to local nodes, cecectomy or rarely, right hemicolectomy, is the usual treatment. It has become accepted practice to remove the entire right colon in patients with large carcinoid tumors of the appendix (>2 cm in diameter) or with tumors that have spread to the nodes; however, this practice remains controversial. A MEDLINE search did not find any documented cases of childhood localized appendiceal carcinoid in children younger than 18 years with complete resection who relapsed. Treatment of metastatic carcinoid tumors of the large bowel or stomach becomes more complicated and requires treatment similar to that given for colorectal carcinoma. (Refer to the PDQ summary on adult Gastrointestinal Carcinoid Tumors for therapeutic options in patients with malignant carcinoid tumors.)
The carcinoid syndrome of excessive excretion of somatostatin is characterized by flushing, labile blood pressure, and metastatic spread of the tumor to the liver. Symptoms may be lessened by giving somatostatin analogs, which are available in short-acting and long-acting forms. Occasionally, carcinoids may produce ectopic ACTH and cause Cushing disease.
Gastrointestinal Stromal Tumors (GIST)
Gastrointestinal stromal tumors (GIST) are the most common mesenchymal neoplasms of the gastrointestinal tract in adults. These tumors are rare in children. Approximately 2% of all GIST occur in children and young adults; in one series, pediatric GIST accounted for 2.5% of all pediatric nonrhabdomyosarcomatous soft tissue sarcomas. Previously, these tumors were diagnosed as leiomyomas, leiomyosarcomas, and leiomyoblastomas. In pediatric patients, GIST are most commonly located in the stomach and usually occur in adolescent females.
- Carney triad is a syndrome characterized by the occurrence of GIST, lung chondromas, and paragangliomas. In addition, about 20% of patients have adrenal adenomas and 10% have esophageal leiomyomas. GIST are the most common (75%) presenting lesions in these patients. To date, no coding sequence mutations of KIT, PDGFR, or the succinate dehydrogenase (SDH) genes have been found in these patients.
- Carney-Stratakis syndrome is characterized by paraganglioma and GIST due to germline mutations of the SDH genes B, C, and D.
Histology and molecular genetics
Histologically, pediatric GIST have a predominance of epithelioid or epithelioid/spindle cell morphology and, unlike adult GIST, their mitotic rate does not appear to accurately predict clinical behavior. Most pediatric patients with GIST present during the second decade of life with anemia-related gastrointestinal bleeding. In addition, pediatric GIST have a high propensity for multifocality (23%) and nodal metastases. These features may account for the high incidence of local recurrence seen in this patient population.
Pediatric GIST is biologically different from adult GIST. Activating mutations of KIT and PDGFA, which are seen in 90% of adult GIST, are present in only 11% of pediatric GIST. In addition, unlike adult KIT mutant GIST, pediatric GIST have minimal large-scale chromosomal changes and the expression of insulin-like growth factor 1 receptor (IGF1R) expression is significantly higher and amplified in these patients, suggesting that administration of an IGF1R inhibitor might be therapeutically beneficial in these patients.
Recent studies have revealed that about 12% of patients with wild-type GIST and a negative history of paraganglioma have germline mutations in the SDH B or C gene. In addition, using immunohistochemistry, SDHB expression is absent in all pediatric wild-type GIST, implicating cellular respiration defects in the pathogenesis of this disease. Furthermore, these findings support the notion that pediatric patients with wild-type GIST should be offered testing for constitutional mutations for the SDH complex. The routine use of immunohistochemistry has documented lack of SDHB expression in 94% of children younger than 20 years with wild-type GIST and some investigators now favor the term SDH-deficient GIST. This group of patients lack KIT, PDGFR, and BRAF mutations in the primary tumor and lack SDHB immunoreactivity in the tumor. SDH-deficient GIST more commonly affects females, has an indolent clinical course, and occurs in the stomach.
Treatment of GIST
Once the diagnosis of pediatric GIST is established, it is recommended that patients be seen at centers with expertise in the treatment of GIST and that all samples be subjected to mutational analysis for KIT (exons 9, 11, 13, 17), PDGFR (exons 12, 14, 18), and BRAF (V600E).
Treatment of GIST varies based on whether a mutation is detected:
- GIST with a KIT or PDGFR mutation: Pediatric patients who harbor KIT or PDGFR mutations should be managed according to adult guidelines.
- Wild-type GIST (no mutation): For most pediatric patients with wild-type GIST complete surgical resection of localized disease is recommended as long as it can be accomplished without significant morbidity (i.e., gastrectomy). When feasible, wedge resections are an acceptable surgical option. Since lymph node involvement is relatively common in younger patients, searching for overt or occult nodal involvement should be encouraged. Given the indolent course of the disease in pediatric patients, it is reasonable to withhold extensive and mutilative surgeries and to carefully observe children with locally recurrent or unresectable asymptomatic disease. A randomized clinical trial in adults demonstrated that administration of adjuvant imatinib mesylate improved event-free survival in adult patients with GIST but this benefit was restricted to those with KIT exon 11 and PDGFR mutations, and thus the use of this agent in the adjuvant setting in pediatric wild-type GIST cannot be recommended. Responses to imatinib and sunitinib in pediatric patients with wild-type GIST are uncommon and consist mainly of disease stabilization. In a review of ten patients who were treated with imatinib mesylate, one patient experienced a partial response and three patients had stable disease. In another study, the clinical activity of sunitinib in six children with imatinib-resistant GIST was reported as one partial response and five stable disease.
Genital/urinary tumors include carcinoma of the bladder, non-germ cell testicular cancer, non-germ cell ovarian cancer, and carcinoma of the cervix and vagina. The prognosis, diagnosis, classification, and treatment of these genital/urinary tumors are discussed below. It must be emphasized that these tumors are seen very infrequently in patients younger than 15 years, and most of the evidence is derived from case series.
Carcinoma of the Bladder
Incidence, risk factors, and clinical presentation
Carcinoma of the bladder is extremely rare in children. The most common carcinoma to involve the bladder is papillary urothelial neoplasm of low malignant potential, which generally presents with hematuria.
Bladder cancer in adolescents may develop as a consequence of alkylating-agent chemotherapy given for other childhood tumors or leukemia. The association between cyclophosphamide and bladder cancer is the only established relationship between a specific anticancer drug and a solid tumor.
Prognosis and treatment
In contrast to adults, most pediatric bladder carcinomas are low grade, superficial, and have a good prognosis following transurethral resection. Squamous cell carcinoma and more aggressive carcinomas, however, have been reported and may require a more aggressive surgical approach.
(Refer to the PDQ summary on adult Bladder Cancer Treatment for more information.)
Testicular Cancer (Non-Germ Cell)
Testicular tumors are very rare in young boys and account for an incidence of 1% to 2% of all childhood tumors. The most common testicular tumors are benign teratomas followed by malignant nonseminomatous germ cell tumors. (Refer to the PDQ summary on Childhood Extracranial Germ Cell Tumors for more information.) Non–germ cell tumors such as sex cord–stromal tumors are exceedingly rare in prepubertal boys. In a small series, gonadal stromal tumors accounted for 8% to 13% of pediatric testicular tumors. In newborns and infants, juvenile granulosa cell tumors are the most common stromal cell tumor. In older males, Leydig cell tumors are more common. Stromal cell tumors have been described as benign in young boys.
There are conflicting data about malignant potential in older males. Most case reports suggest that in the pediatric patients, these tumors can be treated with surgery alone.[Level of evidence: 3iii]; [Level of evidence: 3iiiA]; [Level of evidence: 3iiiDii] However, given the rarity of this tumor, the surgical approach in pediatrics has not been well studied.
Ovarian Cancer (Non–Germ Cell)
The majority of ovarian masses in children are not malignant.
The most common neoplasms are germ cell tumors, followed by epithelial tumors, stromal tumors, and then miscellaneous tumors such as Burkitt lymphoma. The majority of malignant ovarian tumors occur in girls aged 15 to 19 years.
Epithelial ovarian neoplasia
Ovarian tumors derived from malignant epithelial elements include: adenocarcinomas, cystadenocarcinomas, endometrioid tumors, clear cell tumors, and undifferentiated carcinomas. In one series of 19 patients younger than 21 years with epithelial ovarian neoplasms, the average age at diagnosis was 19.7 years. Dysmenorrhea and abdominal pain were the most common presenting symptoms; 79% of the patients had stage I disease with a 100% survival rate, and only those who had small cell anaplastic carcinoma died.
Girls with ovarian carcinoma (epithelial ovarian neoplasia) fare better than adults with similar histology, probably because girls usually present with low-stage disease.
Treatment is stage-related and may include surgery, radiation, and chemotherapy with cisplatin, carboplatin, etoposide, topotecan, paclitaxel, and other agents.
Sex cord–stromal tumors
Ovarian sex cord–stromal tumors are a heterogeneous group of rare tumors that derive from the gonadal non-germ cell component. Histologic subtypes display some areas of gonadal differentiation and include juvenile granulosa cell tumors, Sertoli-Leydig cell tumors, and sclerosing stromal tumors. Ovarian sex-cord stromal tumors in children and adolescents are commonly associated with the presence of germline DICER1 mutations and may be a manifestation of the familial pleuropulmonary blastoma syndrome.
Juvenile granulosa cell tumors
The most common histologic subtype in girls younger than 18 years is juvenile granulosa cell tumors (median age, 7.6 years; range, birth to 17.5 years). Juvenile granulosa cell tumors represent about 5% of ovarian tumors in children and adolescents and are distinct from the granulosa cell tumors seen in adults.
Most patients with juvenile granulosa cell tumors present with precocious puberty. Other presenting symptoms include abdominal pain, abdominal mass, and ascites. Juvenile granulosa cell tumors has been reported in children with Ollier disease and Maffucci syndrome.
As many as 90% of children with juvenile granulosa cell tumors will have low-stage disease (International Federation of Gynecology and Obstetrics [FIGO] stage I) and are usually curable with unilateral salpingo-oophorectomy alone. Patients with advanced disease (FIGO stage II–IV) and those with high mitotic activity tumors have a poorer prognosis.
Sertoli-Leydig cell tumors
Sertoli-Leydig cell tumors are rare in young girls but may present with virilization  or precocious puberty. These tumors may also be associated with Peutz-Jeghers syndrome. In contrast to juvenile granulosa cell tumors, a recent study suggested that Sertoli-Leydig tumors with abdominal spillage (FIGO Stage Ic) should be treated with cisplatin-based chemotherapy.
Small cell carcinoma of the ovary
Small cell carcinomas of the ovary are exceedingly rare and aggressive tumors and may be associated with hypercalcemia. Successful treatment with aggressive therapy has been reported in a few cases.[Level of evidence: 3iiB]; [Level of evidence: 3iiiA]
Carcinoma of the Cervix and Vagina
Incidence, risk factors, and clinical presentation
Adenocarcinoma of the cervix and vagina is rare in childhood and adolescence, with fewer than 50 reported cases. Two-thirds of the cases are related to in utero exposure to diethylstilbestrol.
The median age at presentation is 15 years, with a range of 7 months to 18 years, and with most patients presenting with vaginal bleeding. Adults with adenocarcinoma of the cervix or vagina will present with stage I or stage II disease 90% of the time. In children and adolescents, there is a high incidence of stage III and stage IV disease (24%). This difference may be explained by the practice of routine pelvic examinations in adults and the hesitancy to perform pelvic exams in children.
The treatment of choice is surgical resection, followed by radiation therapy for residual microscopic disease or lymphatic metastases. The role of chemotherapy in management is unknown, although drugs commonly used in the treatment of gynecologic malignancies, carboplatin and paclitaxel, have been used. The 3-year event-free survival (EFS) for all stages is 71% ± 11%; for stage I and stage II, the EFS is 82% ± 11%, and for stage III and stage IV, the EFS is 57% ± 22%.1Alanee S, Shukla AR: Bladder malignancies in children aged <18 years: results from the Surveillance, Epidemiology and End Results database. BJU Int 106 (4): 557-60, 2010.2Paner GP, Zehnder P, Amin AM, et al.: Urothelial neoplasms of the urinary bladder occurring in young adult and pediatric patients: a comprehensive review of literature with implications for patient management. Adv Anat Pathol 18 (1): 79-89, 2011.3Johansson SL, Cohen SM: Epidemiology and etiology of bladder cancer. Semin Surg Oncol 13 (5): 291-8, 1997 Sep-Oct.4IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. International Agency for Research on Cancer.: Overall evaluations of carcinogenicity: an updating of IARC monographs, volumes 1 to 42. IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Supplement 7. Lyon, France: International Agency for Research on Cancer, 1987.5Hoenig DM, McRae S, Chen SC, et al.: Transitional cell carcinoma of the bladder in the pediatric patient. J Urol 156 (1): 203-5, 1996.6Serrano-Durbá A, Domínguez-Hinarejos C, Reig-Ruiz C, et al.: Transitional cell carcinoma of the bladder in children. Scand J Urol Nephrol 33 (1): 73-6, 1999.7Fine SW, Humphrey PA, Dehner LP, et al.: Urothelial neoplasms in patients 20 years or younger: a clinicopathological analysis using the world health organization 2004 bladder consensus classification. J Urol 174 (5): 1976-80, 2005.8Lerena J, Krauel L, García-Aparicio L, et al.: Transitional cell carcinoma of the bladder in children and adolescents: six-case series and review of the literature. J Pediatr Urol 6 (5): 481-5, 2010.9Sung JD, Koyle MA: Squamous cell carcinoma of the bladder in a pediatric patient. J Pediatr Surg 35 (12): 1838-9, 2000.10Lezama-del Valle P, Jerkins GR, Rao BN, et al.: Aggressive bladder carcinoma in a child. Pediatr Blood Cancer 43 (3): 285-8, 2004.11Hartke DM, Agarwal PK, Palmer JS: Testicular neoplasms in the prepubertal male. J Mens Health Gend 3 (2): 131-8, 2006.12Ahmed HU, Arya M, Muneer A, et al.: Testicular and paratesticular tumours in the prepubertal population. Lancet Oncol 11 (5): 476-83, 2010.13Pohl HG, Shukla AR, Metcalf PD, et al.: Prepubertal testis tumors: actual prevalence rate of histological types. J Urol 172 (6 Pt 1): 2370-2, 2004.14Schwentner C, Oswald J, Rogatsch H, et al.: Stromal testis tumors in infants. a report of two cases. Urology 62 (6): 1121, 2003.15Carmignani L, Colombo R, Gadda F, et al.: Conservative surgical therapy for leydig cell tumor. J Urol 178 (2): 507-11; discussion 511, 2007.16Agarwal PK, Palmer JS: Testicular and paratesticular neoplasms in prepubertal males. J Urol 176 (3): 875-81, 2006.17Dudani R, Giordano L, Sultania P, et al.: Juvenile granulosa cell tumor of testis: case report and review of literature. Am J Perinatol 25 (4): 229-31, 2008.18Cecchetto G, Alaggio R, Bisogno G, et al.: Sex cord-stromal tumors of the testis in children. A clinicopathologic report from the Italian TREP project. J Pediatr Surg 45 (9): 1868-73, 2010.19Thomas JC, Ross JH, Kay R: Stromal testis tumors in children: a report from the prepubertal testis tumor registry. J Urol 166 (6): 2338-40, 2001.20Morowitz M, Huff D, von Allmen D: Epithelial ovarian tumors in children: a retrospective analysis. J Pediatr Surg 38 (3): 331-5; discussion 331-5, 2003.21Schultz KA, Sencer SF, Messinger Y, et al.: Pediatric ovarian tumors: a review of 67 cases. Pediatr Blood Cancer 44 (2): 167-73, 2005.22Aggarwal A, Lucco KL, Lacy J, et al.: Ovarian epithelial tumors of low malignant potential: a case series of 5 adolescent patients. J Pediatr Surg 44 (10): 2023-7, 2009.23You W, Dainty LA, Rose GS, et al.: Gynecologic malignancies in women aged less than 25 years. Obstet Gynecol 105 (6): 1405-9, 2005.24Brookfield KF, Cheung MC, Koniaris LG, et al.: A population-based analysis of 1037 malignant ovarian tumors in the pediatric population. J Surg Res 156 (1): 45-9, 2009.25Lovvorn HN 3rd, Tucci LA, Stafford PW: Ovarian masses in the pediatric patient. AORN J 67 (3): 568-76; quiz 577, 580-84, 1998.26Tsai JY, Saigo PE, Brown C, et al.: Diagnosis, pathology, staging, treatment, and outcome of epithelial ovarian neoplasia in patients age < 21 years. Cancer 91 (11): 2065-70, 2001.27Schneider DT, Jänig U, Calaminus G, et al.: Ovarian sex cord-stromal tumors--a clinicopathological study of 72 cases from the Kiel Pediatric Tumor Registry. Virchows Arch 443 (4): 549-60, 2003.28Schultz KA, Pacheco MC, Yang J, et al.: Ovarian sex cord-stromal tumors, pleuropulmonary blastoma and DICER1 mutations: a report from the International Pleuropulmonary Blastoma Registry. Gynecol Oncol 122 (2): 246-50, 2011.29Calaminus G, Wessalowski R, Harms D, et al.: Juvenile granulosa cell tumors of the ovary in children and adolescents: results from 33 patients registered in a prospective cooperative study. Gynecol Oncol 65 (3): 447-52, 1997.30Capito C, Flechtner I, Thibaud E, et al.: Neonatal bilateral ovarian sex cord stromal tumors. Pediatr Blood Cancer 52 (3): 401-3, 2009.31Bouffet E, Basset T, Chetail N, et al.: Juvenile granulosa cell tumor of the ovary in infants: a clinicopathologic study of three cases and review of the literature. J Pediatr Surg 32 (5): 762-5, 1997.32Zaloudek C, Norris HJ: Granulosa tumors of the ovary in children: a clinical and pathologic study of 32 cases. Am J Surg Pathol 6 (6): 503-12, 1982.33Vassal G, Flamant F, Caillaud JM, et al.: Juvenile granulosa cell tumor of the ovary in children: a clinical study of 15 cases. J Clin Oncol 6 (6): 990-5, 1988.34Kalfa N, Patte C, Orbach D, et al.: A nationwide study of granulosa cell tumors in pre- and postpubertal girls: missed diagnosis of endocrine manifestations worsens prognosis. J Pediatr Endocrinol Metab 18 (1): 25-31, 2005.35Gell JS, Stannard MW, Ramnani DM, et al.: Juvenile granulosa cell tumor in a 13-year-old girl with enchondromatosis (Ollier's disease): a case report. J Pediatr Adolesc Gynecol 11 (3): 147-50, 1998.36Powell JL, Connor GP, Henderson GS: Management of recurrent juvenile granulosa cell tumor of the ovary. Gynecol Oncol 81 (1): 113-6, 2001.37Schneider DT, Calaminus G, Wessalowski R, et al.: Therapy of advanced ovarian juvenile granulosa cell tumors. Klin Padiatr 214 (4): 173-8, 2002 Jul-Aug.38Schneider DT, Calaminus G, Harms D, et al.: Ovarian sex cord-stromal tumors in children and adolescents. J Reprod Med 50 (6): 439-46, 2005.39Arhan E, Cetinkaya E, Aycan Z, et al.: A very rare cause of virilization in childhood: ovarian Leydig cell tumor. J Pediatr Endocrinol Metab 21 (2): 181-3, 2008.40Baeyens L, Amat S, Vanden Houte K, et al.: Small cell carcinoma of the ovary successfully treated with radiotherapy only after surgery: case report. Eur J Gynaecol Oncol 29 (5): 535-7, 2008.41Choong CS, Fuller PJ, Chu S, et al.: Sertoli-Leydig cell tumor of the ovary, a rare cause of precocious puberty in a 12-month-old infant. J Clin Endocrinol Metab 87 (1): 49-56, 2002.42Zung A, Shoham Z, Open M, et al.: Sertoli cell tumor causing precocious puberty in a girl with Peutz-Jeghers syndrome. Gynecol Oncol 70 (3): 421-4, 1998.43Distelmaier F, Calaminus G, Harms D, et al.: Ovarian small cell carcinoma of the hypercalcemic type in children and adolescents: a prognostically unfavorable but curable disease. Cancer 107 (9): 2298-306, 2006.44Christin A, Lhomme C, Valteau-Couanet D, et al.: Successful treatment for advanced small cell carcinoma of the ovary. Pediatr Blood Cancer 50 (6): 1276-7, 2008.45Kanwar VS, Heath J, Krasner CN, et al.: Advanced small cell carcinoma of the ovary in a seventeen-year-old female, successfully treated with surgery and multi-agent chemotherapy. Pediatr Blood Cancer 50 (5): 1060-2, 2008.46McNall RY, Nowicki PD, Miller B, et al.: Adenocarcinoma of the cervix and vagina in pediatric patients. Pediatr Blood Cancer 43 (3): 289-94, 2004.47Abu-Rustum NR, Su W, Levine DA, et al.: Pediatric radical abdominal trachelectomy for cervical clear cell carcinoma: a novel surgical approach. Gynecol Oncol 97 (1): 296-300, 2005.
Other Rare Childhood Cancers
Other rare childhood cancers include multiple endocrine neoplasia syndromes and Carney complex, skin cancer, chordoma, and cancer of unknown primary site. The prognosis, diagnosis, classification, and treatment of these other rare childhood cancers are discussed below. It must be emphasized that these cancers are seen very infrequently in patients younger than 15 years, and most of the evidence is derived from case series.
Multiple Endocrine Neoplasia (MEN) Syndromes and Carney Complex
MEN syndromes are familial disorders that are characterized by neoplastic changes that affect multiple endocrine organs. Changes may include hyperplasia, benign adenomas, and carcinomas. There are two main types of MEN syndrome: type 1 and type 2. MEN type 2 can be further subdivided into three subtypes: type 2A, type 2B, and familial medullary thyroid carcinoma. (Refer to the PDQ summary on Genetics of Endocrine and Neuroendocrine Neoplasias for more information about MEN syndromes.)
Clinical presentation and diagnostic evaluation of MEN syndromes
The most salient clinical and genetic alterations of the MEN syndromes are shown in Table 5.Table 5. MEN Syndromes with Associated Clinical and Genetic Alterations SyndromeClinical Features/TumorsGenetic AlterationsMEN type 1: Werner syndrome Parathyroid11q13 (MEN1 gene)Pancreatic islets: Gastrinoma11q13 (MEN1 gene)InsulinomaGlucagonomaVIPomaPituitary:Prolactinoma11q13 (MEN1 gene)SomatotrophinomaCorticotropinomaOther associated tumors: Carcinoid: bronchial and thymic11q13 (MEN1 gene)AdrenocorticalLipomaMEN type 2A: Sipple syndromeMedullary thyroid carcinoma10q11.2 (RET gene)PheochromocytomaParathyroid glandMEN type 2BMedullary thyroid carcinoma10q11.2 (RET gene)PheochromocytomaMucosal neuromasIntestinal ganglioneuromatosisMarfanoid habitusFamilial medullary thyroid carcinomaMedullary thyroid carcinoma10q11.2 (RET gene)
- MEN 1 syndrome: MEN 1 syndrome, also referred to as Werner syndrome, is an autosomal dominant disorder characterized by the presence of tumors in the parathyroid, pancreatic islet cells, and anterior pituitary. Diagnosis of this syndrome should be considered when two of the three endocrine tumors listed in the table above are present. Less common tumors associated with this syndrome include adrenocortical tumors, carcinoid tumors, lipomas, angiofibromas, and collagenomas. The first manifestation of the disease in 90% of patients is hypercalcemia; the most common cause of morbidity and mortality in these patients is the development of gastrinomas, leading to Zollinger-Ellison syndrome. Germline mutations of the MEN1 gene located on chromosome 11q13 are found in 70% to 90% of patients; however, this gene has also been shown to be frequently inactivated in sporadic tumors. Mutation testing should be combined with clinical screening for patients and family members with proven at-risk MEN 1 syndrome. It is recommended that screening for patients with MEN 1 syndrome begin by the age of 5 years and continue for life. The number of tests or biochemical screening is age specific and may include yearly serum calcium, parathyroid hormone, gastrin, glucagon, secretin, proinsulin, chromogranin A, prolactin, and IGF-1. Radiologic screening should include a magnetic resonance imaging of the brain and computed tomography (CT) of the abdomen every 1 to 3 years.
- MEN 2A and 2B syndromes: A germline activating mutation in the RET oncogene (a receptor tyrosine kinase) on chromosome 10q11.2 is responsible for the uncontrolled growth of cells in medullary thyroid carcinoma associated with MEN 2A and MEN 2B syndromes.MEN 2A is characterized by the presence of two or more endocrine tumors (see Table 6) in an individual or in close relatives. RET mutations in these patients are usually confined to exons 10 and 11. MEN 2B is characterized by medullary thyroid carcinomas, parathyroid hyperplasias, adenomas, pheochromocytomas, mucosal neuromas, and ganglioneuromas. The medullary thyroid carcinomas that develop in these patients are extremely aggressive. More than 95% of mutations in these patients are confined to codon 918 in exon 16, causing receptor autophosphorylation and activation. Patients also have medullated corneal nerve fibers, distinctive faces with enlarged lips, and an asthenic Marfanoid body habitus. A pentagastrin stimulation test can be used to detect the presence of medullary thyroid carcinoma in such patients, although management of patients is driven primarily by the results of genetic analysis for RET mutations. Guidelines for genetic testing of suspected patients with MEN2 syndrome and the correlations between the type of mutation and the risk levels of aggressiveness of medullary thyroid cancer, have been published.
- Familial Medullary Thyroid Carcinoma: Familial medullary thyroid carcinoma is diagnosed in families with medullary thyroid carcinoma in the absence of pheochromocytoma or parathyroid adenoma/hyperplasia. RET mutations in exons 10, 11, 13, and 14 account for most cases. (See Table 6.)
Treatment of MEN syndromes
- MEN 1 syndrome: Treatment of patients with MEN 1 syndrome is based on the type of tumor. The outcome of patients with the MEN 1 syndrome is generally good provided adequate treatment can be obtained for parathyroid, pancreatic, and pituitary tumors.
- MEN 2 syndromes: The management of medullary thyroid cancer in children from families having the MEN 2 syndromes relies on presymptomatic detection of the RET proto-oncogene mutation responsible for the disease. MEN 2A syndrome: For children with MEN 2A, thyroidectomy is commonly performed by approximately age 5 years or older if that is when a mutation is identified.  The outcome for patients with the MEN 2A syndrome is also generally good, yet the possibility exists for recurrence of medullary thyroid carcinoma and pheochromocytoma. Relatives of patients with MEN 2A should undergo genetic testing in early childhood, before the age of 5 years. Carriers should undergo total thyroidectomy as described above with autotransplantation of one parathyroid gland by a certain age.MEN 2B syndrome: Because of the increased virulence of medullary thyroid carcinoma in children with MEN 2B and in those with mutations in codons 883, 918, and 922, it is recommended that these children undergo prophylactic thyroidectomy in infancy.; [Level of evidence: 3iiiDii] Patients who have the MEN 2B syndrome have a worse outcome primarily due to more aggressive medullary thyroid carcinoma. Prophylactic thyroidectomy has the potential to improve the outcome in MEN 2B, but there are no long-term outcome reports published to date.Complete removal of the thyroid gland is the recommended procedure for surgical management of medullary thyroid cancer in children, since there is a high incidence of bilateral disease.Hirschsprung disease has been associated in a small percentage of cases with the development of neuroendocrine tumors such as medullary thyroid carcinoma. RET germline inactivating mutations have been detected in up to 50% of patients with familial Hirschsprung disease and less often in the sporadic form. Cosegregation of Hirschsprung disease and medullary thyroid carcinoma phenotype is infrequently reported, but these individuals usually have a mutation in RET exon 10. It has been recommended that patients with Hirschsprung disease be screened for mutations in RET exon 10 and consideration be given to prophylactic thyroidectomy if such a mutation is discovered.(Refer to the PDQ summary on Genetics of Endocrine and Neuroendocrine Neoplasias for more information about MEN 2A and MEN 2B.)
In a randomized phase III trial for adult patients with unresectable locally advanced or metastatic hereditary or sporadic medullary thyroid carcinoma treated with vandetanib, a selective inhibitor of RET, VEGFR, and EGFR, versus placebo, vandetanib administration was associated with significant improvements in progression-free survival, response rate, disease control rates, and biochemical response.
Treatment options under clinical evaluation
The following is an example of a national and/or institutional clinical trial that is currently being conducted. Information about ongoing clinical trials is available from the NCI Web site.
- NCI-07-C-0189 (NCT00514046) (Vandetanib to Treat Children and Adolescents With Medullary Thyroid Cancer): This phase I/II NCI trial is investigating vandetanib, an orally available tyrosine kinase receptor inhibitor, for patients aged 5 to 18 years, with hereditary thyroid medullary carcinoma.
The Carney complex is an autosomal dominant syndrome caused by mutations in the PPKAR1A gene, located in chromosome 17. The syndrome is characterized by cardiac and cutaneous myxomas, pale brown to brown lentigines, blue nevi, primary pigmented nodular adrenocortical disease causing Cushing syndrome, and a variety of endocrine and nonendocrine tumors, including pituitary adenomas, thyroid tumors, and large cell calcifying Sertoli cell tumor of the testis. There are guidelines that may be followed for screening patients with Carney complex.
For patients with the Carney complex, prognosis depends on the frequency of recurrences of cardiac and skin myxomas and other tumors.
Pheochromocytoma and Paraganglioma
Pheochromocytoma and paraganglioma are rare catecholamine-producing tumors with a combined annual incidence of three cases per 1 million individuals. Tumors arising within the adrenal gland are known as pheochromocytomas, whereas morphologically identical tumors arising elsewhere are termed paragangliomas. Paragangliomas are further divided into: (1) sympathetic paragangliomas that predominantly arise from the intra-abdominal sympathetic trunk and usually produce catecholamines, and (2) parasympathetic paragangliomas that are distributed along the parasympathetic nerves of the head, neck, and mediastinum and are rarely functional.
It is now estimated that up to 30% of all pheochromocytomas and paragangliomas are familial; several susceptibility genes have been described (see Table 7). The median age at presentation in most familial syndromes is 30 to 35 years, and up to 50% of subjects have disease by age 26 years.Table 7. Characteristics of Paraganglioma (PGL) and Pheochromocytoma (PCC) Associated with Susceptibility GenesaGermline Mutation SyndromeProportion of all PGL/PCC (%)Mean Age at Presentation (y)Penetrance of PGL/PCC (%)MEN1 = multiple endocrine neoplasia type 1; MEN2 = multiple endocrine neoplasia type 2; NF1 = neurofibromatosis type 1; VHL = von Hippel-Lindau.aAdapted from Welander et al.RET MEN2 5.3 35.6 50 VHLVHL9.028.610–26NF1NF12.9 41.60.1–5.7SDHDPGL17.1 35.086SDHFA2PGL2<1 32.2100SDHC PGL3 <142.7UnknownSDHBPGL4 5.532.777SDHA-<340.0Unknown KIF1B-beta - <146.0UnknownEGLN1- <1 43.0 UnknownTMEM127- <2 42.8 Unknown MAX -<234 UnknownUnknownCarney triad<127.5 -SDHB, C, DCarney-Stratakis<133UnknownMEN1MEN1<130.5Unknown No mutation Sporadic disease70 48.3-
- Von Hippel-Lindau (VHL) syndrome—Pheochromocytoma and paraganglioma occur in 10% to 20% of patients with VHL.
- Multiple Endocrine Neoplasia (MEN) Syndrome Type 2—Codon-specific mutations of the RET gene are associated with a 50% risk of development of pheochromocytoma in MEN 2A and MEN 2B. Somatic RET mutations are also found in sporadic pheochromocytoma and paraganglioma.
- Neurofibromatosis type 1 (NF1)—Pheochromocytoma and paraganglioma are a rare occurrence in patients with NF1, and typically have characteristics similar to those of sporadic tumors, with a relatively late mean age of onset and rarity in pediatrics.
- Familial pheochromocytoma/paraganglioma syndromes, associated with germline mutations of mitochondrial succinate dehydrogenase (SDH) complex genes (see Table 7). They are all inherited in an autosomal dominant manner but with varying penetrance.PGL1—Associated with SDHD mutations, manifests more commonly with head and neck paragangliomas, and has a very high penetrance, with more than 80% of carriers developing disease by age 50 years.PGL2—Associated with SDHAF2 mutations, is very rare, and generally manifests as parasympathetic paraganglioma.PGL3—Associated with SDHC mutations, is very rare, and usually presents with parasympathetic paraganglioma, often unifocal, benign, and in the head and neck location.PGL4—Associated with SDHB mutations and usually manifests with intra-abdominal sympathetic paraganglioma. The neoplasms associated with this mutation have a much higher risk of malignant behavior, with more than 50% of patients developing metastatic disease. There is also an increased risk of renal cell carcinoma and gastrointestinal stromal tumor (GIST).
- Other susceptibility genes recently discovered include KIF1B-beta, EGLN1/PHD2, TMEM127, SDHA, and MAX.
- Other syndromes:Carney triad syndrome is a condition that includes three tumors: paraganglioma, GIST, and pulmonary chondromas. Pheochromocytomas and other lesions such as esophageal leiomyomas and adrenocortical adenomas have also been described. The syndrome primarily affects young women, with a mean age of 21 years at time of presentation. Approximately one-half of the patients present with paraganglioma or pheochromocytoma, although multiple lesions occur in approximately only 20% of the cases. About 20% of the patients have all three tumor types; the remainder have two of the three, most commonly GIST and pulmonary chondromas. This triad doesn’t appear to run in families and no responsible gene has been discovered.Carney-Stratakis syndrome (Carney dyad syndrome) is a condition that includes paraganglioma and GIST, but no pulmonary chondromas. It is inherited in an autosomal dominant manner with incomplete penetrance. It is equally common in men and women, with an average age of 23 years at presentation. The majority of patients with this syndrome have been found to carry germline mutations in the SDHB, SDHC, or SDHD genes.
Immunohistochemical SDHB staining may help triage genetic testing; tumors of patients with SDHB, SDHC, and SDHD mutations have absent or very weak staining, while sporadic tumors and those associated with other constitutional syndromes have positive staining. Therefore, immunohistochemical SDHB staining can help identify potential carriers of a SDH mutation early, thus obviating the need for extensive and costly testing of other genes.
Patients with pheochromocytoma and sympathetic extra-adrenal paraganglioma usually present with symptoms of excess catecholamine production, including hypertension, headache, perspiration, palpitations, tremor, and facial pallor. These symptoms are often paroxysmal, although sustained hypertension between paroxysmal episodes occurs in more than one-half the patients. These symptoms can also be induced by exertion, trauma, labor and delivery, induction of anesthesia, surgery of the tumor, foods high in tyramine (e.g., red wine, chocolate, cheese), or urination (in cases of primary tumor of the bladder). Parasympathetic extra-adrenal paragangliomas do not secrete catecholamines and usually present as a neck mass with symptoms related to compression, but also may be asymptomatic and diagnosed incidentally.
Paraganglioma and pheochromocytoma in children and adolescents
Younger patients have a higher incidence of bilateral adrenal pheochromocytoma and extra-adrenal paraganglioma, and a germline mutation can be identified in close to 60% of patients. Therefore, genetic counseling and testing is always recommended in young patients. The pediatric and adolescent patient appears to present with symptoms similar to those of the adult patient, although with a more frequent occurrence of sustained hypertension. The clinical behavior of paraganglioma and pheochromocytoma appears to be more aggressive in children and adolescents and metastatic rates of up to 50% have been reported.
In a study of 49 patients younger than 20 years with a paraganglioma or pheochromocytoma, 39 (79%) had an underlying germline mutation that involved the SDHB (n = 27; 55%), SDHD (n = 4; 8%), VHL (n = 6; 12%), or NF1 (n = 2; 4%) genes. The germline mutation rates for patients with nonmetastatic disease were lower than those observed in patients who had evidence of metastases (64% vs. 87.5%). Furthermore, among patients with metastatic disease, the incidence of SDHB mutations was very high (72%) and most presented with disease in the retroperitoneum; five died of their disease. All patients with SDHD mutations had head and neck primary tumors. In another study, the incidence of germline mutations involving RET, VHL, SDHD and SDHB in patients with nonsyndromic paraganglioma was 70% for patients younger than 10 years and 51% among those aged 10 to 20 years. In contrast, only 16% of patients older than 20 years had an identifiable mutation. It is important to remember that these two studies did not include systematic screening for other genes that have been recently described in paraganglioma and pheochromocytoma syndromes such as KIF1B-beta, EGLN1/PHD2, TMEM127, SDHA, and MAX (see Table 7).
These findings suggest that younger patients with extra-adrenal nonsyndromic pheochromocytoma and paraganglioma are at high risk for harboring SDHB mutations and that this phenotype is associated with an earlier age of onset and a high rate of metastatic disease. Early identification of young patients with SDHB mutations using radiographic, serologic, and immunohistochemical markers could potentially decrease mortality and identify other family members who carry a germline SDHB mutation. In addition, approximately 12% of pediatric GIST patients have germline SDHB, SDHC, or SDHD mutations in the context of Carney-Stratakis syndrome.
The diagnosis of paraganglioma and pheochromocytoma relies on the biochemical documentation of excess catecholamine secretion coupled with imaging studies for localization and staging.
Measurement of plasma-free fractionated metanephrines (metanephrine and normetanephrine) is usually the diagnostic tool of choice when the diagnosis of a secreting paraganglioma or pheochromocytoma is suspected. A 24-hour urine collection for catecholamines (epinephrine, norepinephrine, and dopamine) and fractionated metanephrines can also be performed for confirmation.
Catecholamine metabolic and secretory profiles are impacted by hereditary background; both hereditary and sporadic paraganglioma and pheochromocytoma differ markedly in tumor contents of catecholamines and corresponding plasma and urinary hormonal profiles. About 50% of secreting tumors produce and contain a mixture of norepinephrine and epinephrine, while most of the rest produce norepinephrine almost exclusively, with occasional rare tumors producing mainly dopamine. Patients with epinephrine-producing tumors are diagnosed later (median age, 50 years) than those with tumors lacking appreciable epinephrine production (median age, 40 years). Patients with MEN2 and NF1 syndromes, all with epinephrine-producing tumors, are typically diagnosed at a later age (median age, 40 years) than patients with tumors that lack appreciable epinephrine production secondary to mutations of VHL and SDH (median age, 30 years). These variations in ages at diagnosis associated with different tumor catecholamine phenotypes and locations suggest origins of paraganglioma and pheochromocytoma for different progenitor cells with variable susceptibility to disease-causing mutations.
Imaging modalities available for the localization of paraganglioma and pheochromocytoma include CT, magnetic resonance imaging, iodine I-123 or iodine I-131–labeled metaiodobenzylguanidine (123/131I-mIBG) scintigraphy, and fluorine F-18 6-fluorodopamine (6-[18F]FDA) positron emission tomography (PET). For tumor localization, 6-[18F]FDA PET and 123/131I-mIBG scintigraphy perform equally well in patients with nonmetastatic paraganglioma and pheochromocytoma, but metastases are better detected by 6-[18F]FDA PET than by 123/131I-mIBG. Other functional imaging alternatives include indium In-111 octreotide scintigraphy and fluorodeoxyglucose F-18 PET, both of which can be coupled with CT imaging for improved anatomic detail.
Treatment of paraganglioma and pheochromocytoma is surgical. For secreting tumors, alpha and beta adrenergic blockade must be optimized prior to surgery. For patients with metastatic disease, responses have been documented to some chemotherapeutic regimens such as gemcitabine and docetaxel or vincristine, cyclophosphamide, and dacarbazine. Chemotherapy may help alleviate symptoms and facilitate surgery, although its impact in overall survival is less clear. Responses have also been obtained to high-dose 131I-mIBG.
Skin Cancer (Melanoma, Basal Cell Carcinoma, and Squamous Cell Carcinoma)
Melanoma, although rare, is the most common skin cancer in children, followed by basal cell carcinomas (BCCs) and squamous cell carcinomas (SCCs).  In a retrospective study of 22,524 skin pathology reports in patients younger than 20 years, investigators identified 38 melanomas, 33 of which occurred in patients aged 15 to 19 years. Study investigators reported that the number of lesions that needed to be excised in order to identify one melanoma was 479.8, which is 20 times higher than the adult population.
In patients younger than 20 years, there are approximately 425 cases of melanoma diagnosed each year in the United States, representing about 1% of all new cases of melanoma. Melanoma annual incidence in the United States (2002–2006) increases with age, from 1 to 2 per 1 million in children younger than 10 years to 4.1 per 1 million in children aged 10 to 14 years and 16.9 per 1 million in children aged 15 to 19 years. Melanoma accounts for about 8% of all cancers in children aged 15 to 19 years. The incidence of pediatric melanoma (in children younger than 20 years) increased by 1.7% per year between 1975 and 2006. Increased exposure to ambient ultraviolet radiation increases the risk of the disease.
Conditions associated with an increased risk of developing melanoma in children and adolescents include giant melanocytic nevi, xeroderma pigmentosum (a rare recessive disorder characterized by extreme sensitivity to sunlight, keratosis, and various neurologic manifestations), immunodeficiency, immunosuppression, history of retinoblastoma, and Werner syndrome. Other phenotypic traits that are associated with an increased risk of melanoma in adults have been documented in children and adolescents with melanoma and include exposure to ultraviolet sunlight, red hair, blue eyes, poor tanning ability, freckling, dysplastic nevi, increased number of melanocytic nevi, and family history of melanoma. Neurocutaneous melanosis is an unusual condition associated with large or multiple congenital nevi of the skin in association with meningeal melanosis or melanoma; approximately 2.5% of patients with large congenital nevi develop this condition, and those with increased numbers of satellite nevi are at greatest risk.
Pediatric melanoma shares many similarities with adult melanoma, and the prognosis is stage dependent. Overall 5-year survival of children and adolescents with melanoma is approximately 90%. Approximately three-fourths of all children and adolescents present with localized disease and have an excellent outcome (>90% 5-year survival). The outcome for patients with nodal disease is intermediate, with about 60% expected to survive long term. In one study, the outcome for patients with metastatic disease was favorable, but this result was not duplicated in another study from the National Cancer Database.
In pediatric melanoma, the association of thickness with clinical outcome is controversial. In addition, pediatric melanoma appears to have a higher incidence of nodal involvement and this feature does not appear to have an impact on survival. However, it is unclear how these findings truly affect clinical outcome since some series have included patients with atypical melanocytic lesions. In a study of sentinel lymph node biopsies in children and adolescents, 25% were positive (compared with 17% in adults). However, only 0.7% of lymph nodes found on complete lymph node dissection were positive for melanoma. In this study, mortality was infrequent but was confined to sentinel lymph node–positive patients.[Level of evidence: 3iiA] In another study, 53% of patients younger than 10 years had positive sentinel lymph node biopsy compared with 26% of those who were aged 10 years and older.
Children younger than 10 years who have melanoma often present with poor prognostic features, are more often non-white, have head and neck primary tumors, and more often have syndromes that predispose them to melanoma.
Biopsy or excision is necessary to determine the diagnosis of any skin cancer. Diagnosis is necessary for decisions regarding additional treatment. Although BCCs and SCCs are generally curable with surgery alone, the treatment of melanoma requires greater consideration because of its potential for metastasis. The width of surgical margins in melanoma is dictated by the site, size, and thickness of the lesion and ranges from 0.5 cm for in situ lesions to 2 cm or more for thicker lesions. To achieve negative margins in children, wide excision with skin grafting may become necessary in selected cases. Examination of regional lymph nodes using sentinel lymph node biopsy has become routine in many centers  and is recommended in patients with lesions measuring more than 1 mm in thickness or in those whose lesions are 1 mm or less in thickness and have unfavorable features such as ulceration, Clark level of invasion IV or V, or mitosis rate of 1 per mm2 or higher.
Lymph node dissection is recommended if sentinel nodes are involved with tumor, and adjuvant therapy with high-dose interferon-alpha-2b for a period of 1 year should be considered in these patients. Clinically benign melanocytic lesions can sometimes pose a significant diagnostic challenge, especially when they involve regional lymph nodes.
The diagnosis of pediatric melanoma may be difficult and many of these lesions may be confused with the so-called melanocytic tumors of unknown metastatic potential. These lesions are biologically different from melanoma and benign nevi. The term Spitz nevus and Spitzoid melanoma are also commonly used, creating additional confusion. Novel diagnostic techniques are actively being used by various centers in an attempt to differentiate melanoma from these challenging melanocytic lesions. For example, the absence of BRAF mutations or the presence of a normal chromosomal complement with or without 11p gains strongly argues against the diagnosis of melanoma. In contrast, the use of FISH probes that target four specific regions in chromosomes 6 and 11 can help classify melanoma correctly in over 85% of cases; however, 24% of atypical Spitzoid lesions will have chromosomal alterations on FISH analysis and 75% will have BRAF V600E mutations. HRAS mutations have been described in some cases of Spitz nevi but they have not been described in Spitzoid melanoma. The presence of a HRAS mutation may aid in the differential diagnosis of Spitz nevus and Spitzoid melanoma. Some of the characteristic genetic alterations seen in various melanocytic lesions are summarized in the table below:Table 8. Characteristics of Melanocytic LesionsTumor Affected Gene MelanomaBRAF, NRAS, KITSpitz nevusHRAS; BRAF and NRAS (uncommon)Acquired nevusBRAFDysplastic nevusBRAF, NRASBlue nevusGNAQOcular melanomaGNAQCongenital nevi BRAF, NRAS
Surgery is the treatment of choice for patients with localized melanoma. Current guidelines recommend margins of resection as follows:
- 0.5 cm for melanoma in situ.
- 1.0 cm for melanoma thickness under 1 mm.
- 1 cm to 2 cm for melanoma thickness of 1.01 mm to 2 mm.
- 2 cm for tumor thickness greater than 2 mm.
Sentinel node biopsy should be offered to patients with thin lesions (≤1 mm) and ulceration, mitotic rate greater than 1 mm2, young age, and to patients with lesions greater than 1 mm with or without adverse features. Young patients have a higher incidence of sentinel node positivity and this feature adversely affects clinical outcomes. If the sentinel node is positive, patients should be offered the option to undergo a complete lymph node dissection. Patients with high-risk primary cutaneous melanoma, such as those with regional lymph node involvement, should be offered the option to receive adjuvant interferon alpha-2b, a therapy that is well tolerated in children.
For patients with metastatic disease, prognosis is poor and various agents such as interferon, dacarbazine, temozolomide, sorafenib, or interleukin-2, and biochemotherapy can be used. The results of pediatric trials that incorporate newer therapies such as vemurafenib and ipilimumab are not yet available. Vemurafenib is used only in the treatment of patients with a BRAF mutation.
(Refer to the PDQ summary on adult Melanoma Treatment for more information.)
Basal cell and squamous cell carcinomas
Basal cell carcinomas (BCCs) generally appear as raised lumps or ulcerated lesions, usually in areas with previous sun exposure. These tumors may be multiple and exacerbated by radiation therapy. Nevoid BCC syndrome (Gorlin syndrome) is a rare disorder with a predisposition to the development of early-onset neoplasms, including BCC, ovarian fibroma, and desmoplastic medulloblastoma.  SCCs are usually reddened lesions with varying degrees of scaling or crusting, and they have an appearance similar to eczema, infections, trauma, or psoriasis.
Diagnostic evaluation and treatment
Biopsy or excision is necessary to determine the diagnosis of any skin cancer. Diagnosis is necessary for decisions regarding additional treatment. BCCs and SCCs are generally curable with surgery alone and further diagnostic workup is not indicated.
Most BCCs have activation of the hedgehog pathway, generally resulting from mutations in PTCH1. Vismodegib (GDC-0449), a hedgehog pathway inhibitor, has been approved for the treatment of adult patients with BCC. It was approved by the U.S. Food and Drug Administration for the treatment of adults with metastatic BCC or with locally advanced BCC that has recurred following surgery or who are not candidates for surgery, and who are not candidates for radiation. This drug also reduces the tumor burden in patients with basal cell nevus syndrome.
(Refer to the PDQ summary on adult Skin Cancer Treatment for more information.)
Chordoma is a very rare tumor of bone that arises from remnants of the notochord within the clivus, spinal vertebrae, or sacrum. The incidence in the United States is approximately one case per one million people per year, and only 5% of all chordomas occur in patients younger than 20 years. Most pediatric patients have the conventional or chondroid variant of chordoma.
Patients usually present with pain, with or without neurologic deficits such as cranial or other nerve impairment. Diagnosis is straightforward when the typical physaliferous (soap-bubble-bearing) cells are present. Differential diagnosis is sometimes difficult and includes dedifferentiated chordoma and chondrosarcoma. Childhood chordoma has been associated with tuberous sclerosis complex.
Standard treatment includes surgery and external radiation therapy, often proton-beam radiation. Surgery is not commonly curative in children and adolescents because of difficulty obtaining clear margins and the likelihood of the chordoma arising in the skull base, rather than in the sacrum, making them relatively inaccessible to complete surgical excision. The best results have been obtained using proton-beam therapy (charged-particle radiation therapy).; [Level of evidence: 3iiA]; [Level of evidence: 3iiiDiii]
There is no known effective cytotoxic agent or combination chemotherapy for this disease, with only anecdotal reports published. Imatinib mesylate has been studied in adults with chordoma on the basis of the overexpression of PDGFR alpha, beta, and KIT in this disease. Among 50 adults with chordoma treated with imatinib and evaluable by RECIST, there was one partial response and 28 additional patients had stable disease at 6 months. The low rate of RECIST responses and the potentially slow natural course of the disease complicate the assessment of the efficacy of imatinib for chordoma. Other tyrosine kinase inhibitors and combinations involving kinase inhibitors have been studied.
Recurrences are usually local but can include distant metastases to lungs or bone.
Cancer of Unknown Primary Site
Cancers of unknown primary site present as a metastatic cancer for which a precise primary tumor site cannot be determined. As an example, lymph nodes at the base of the skull may enlarge in relationship to a tumor that may be on the face or the scalp but is not evident by physical examination or by radiographic imaging. Thus, modern imaging techniques may indicate the extent of the disease but not a primary site. Tumors such as adenocarcinomas, melanomas, and embryonal tumors such as rhabdomyosarcomas and neuroblastomas may have the above-mentioned presentation. Children represent less than 1% of all solid cancers of unknown primary site and because of the age-related incidence of tumor types, embryonal histologies are more common in this age group.
For all patients who present with tumors from an unknown primary site, treatment should be directed toward the specific histopathology of the tumor and should be age-appropriate for the general type of cancer initiated, irrespective of the site or sites of involvement. Studies in adults suggest that positron emission tomography (PET) imaging can be helpful in identifying cancers of unknown primary site, particularly in patients whose tumors arise in the head and neck area. A report in adults using fludeoxyglucose (FDG) PET-CT identified 42.5% of primary tumors in a group of cancers of unknown primary site. In addition, molecular assignment of tissue of origin using molecular profiling techniques is feasible and can aid in identifying the putative tissue of origin in about 60% of patients with cancers of unknown primary site. It is still unclear, however, whether these techniques can improve the outcomes or response rates of these patients, and no pediatric studies have been conducted.
Chemotherapy and radiation therapy treatments appropriate and relevant for the general category of carcinoma or sarcoma (depending on the histologic findings, symptoms, and extent of tumor) should be initiated as early as possible.1de Krijger RR: Endocrine tumor syndromes in infancy and childhood. Endocr Pathol 15 (3): 223-6, 2004.2Thakker RV: Multiple endocrine neoplasia--syndromes of the twentieth century. J Clin Endocrinol Metab 83 (8): 2617-20, 1998.3Starker LF, Carling T: Molecular genetics of gastroenteropancreatic neuroendocrine tumors. Curr Opin Oncol 21 (1): 29-33, 2009.4Farnebo F, Teh BT, Kytölä S, et al.: Alterations of the MEN1 gene in sporadic parathyroid tumors. J Clin Endocrinol Metab 83 (8): 2627-30, 1998.5Field M, Shanley S, Kirk J: Inherited cancer susceptibility syndromes in paediatric practice. J Paediatr Child Health 43 (4): 219-29, 2007.6Thakker RV: Multiple endocrine neoplasia type 1 (MEN1). Best Pract Res Clin Endocrinol Metab 24 (3): 355-70, 2010.7Sanso GE, Domene HM, Garcia R, et al.: Very early detection of RET proto-oncogene mutation is crucial for preventive thyroidectomy in multiple endocrine neoplasia type 2 children: presence of C-cell malignant disease in asymptomatic carriers. Cancer 94 (2): 323-30, 2002.8Alsanea O, Clark OH: Familial thyroid cancer. Curr Opin Oncol 13 (1): 44-51, 2001.9Fitze G: Management of patients with hereditary medullary thyroid carcinoma. Eur J Pediatr Surg 14 (6): 375-83, 2004.10Puñales MK, da Rocha AP, Meotti C, et al.: Clinical and oncological features of children and young adults with multiple endocrine neoplasia type 2A. Thyroid 18 (12): 1261-8, 2008.11Skinner MA, DeBenedetti MK, Moley JF, et al.: Medullary thyroid carcinoma in children with multiple endocrine neoplasia types 2A and 2B. J Pediatr Surg 31 (1): 177-81; discussion 181-2, 1996.12Brauckhoff M, Gimm O, Weiss CL, et al.: Multiple endocrine neoplasia 2B syndrome due to codon 918 mutation: clinical manifestation and course in early and late onset disease. World J Surg 28 (12): 1305-11, 2004.13Sakorafas GH, Friess H, Peros G: The genetic basis of hereditary medullary thyroid cancer: clinical implications for the surgeon, with a particular emphasis on the role of prophylactic thyroidectomy. Endocr Relat Cancer 15 (4): 871-84, 2008.14Waguespack SG, Rich TA, Perrier ND, et al.: Management of medullary thyroid carcinoma and MEN2 syndromes in childhood. Nat Rev Endocrinol 7 (10): 596-607, 2011.15Kloos RT, Eng C, Evans DB, et al.: Medullary thyroid cancer: management guidelines of the American Thyroid Association. Thyroid 19 (6): 565-612, 2009.16Skinner MA, Moley JA, Dilley WG, et al.: Prophylactic thyroidectomy in multiple endocrine neoplasia type 2A. N Engl J Med 353 (11): 1105-13, 2005.17Skinner MA: Management of hereditary thyroid cancer in children. Surg Oncol 12 (2): 101-4, 2003.18Learoyd DL, Gosnell J, Elston MS, et al.: Experience of prophylactic thyroidectomy in multiple endocrine neoplasia type 2A kindreds with RET codon 804 mutations. Clin Endocrinol (Oxf) 63 (6): 636-41, 2005.19Guillem JG, Wood WC, Moley JF, et al.: ASCO/SSO review of current role of risk-reducing surgery in common hereditary cancer syndromes. J Clin Oncol 24 (28): 4642-60, 2006.20National Comprehensive Cancer Network.: NCCN Clinical Practice Guidelines in Oncology: Thyroid Carcinoma. Version 1.2011. Rockledge, Pa: National Comprehensive Cancer Network, 2011. Available online with free subscription. Last accessed April 04, 2013.21Lallier M, St-Vil D, Giroux M, et al.: Prophylactic thyroidectomy for medullary thyroid carcinoma in gene carriers of MEN2 syndrome. J Pediatr Surg 33 (6): 846-8, 1998.22Dralle H, Gimm O, Simon D, et al.: Prophylactic thyroidectomy in 75 children and adolescents with hereditary medullary thyroid carcinoma: German and Austrian experience. World J Surg 22 (7): 744-50; discussion 750-1, 1998.23Skinner MA, Wells SA Jr: Medullary carcinoma of the thyroid gland and the MEN 2 syndromes. Semin Pediatr Surg 6 (3): 134-40, 1997.24Heizmann O, Haecker FM, Zumsteg U, et al.: Presymptomatic thyroidectomy in multiple endocrine neoplasia 2a. Eur J Surg Oncol 32 (1): 98-102, 2006.25Frank-Raue K, Buhr H, Dralle H, et al.: Long-term outcome in 46 gene carriers of hereditary medullary thyroid carcinoma after prophylactic thyroidectomy: impact of individual RET genotype. Eur J Endocrinol 155 (2): 229-36, 2006.26Piolat C, Dyon JF, Sturm N, et al.: Very early prophylactic thyroid surgery for infants with a mutation of the RET proto-oncogene at codon 634: evaluation of the implementation of international guidelines for MEN type 2 in a single centre. Clin Endocrinol (Oxf) 65 (1): 118-24, 2006.27Leboulleux S, Travagli JP, Caillou B, et al.: Medullary thyroid carcinoma as part of a multiple endocrine neoplasia type 2B syndrome: influence of the stage on the clinical course. Cancer 94 (1): 44-50, 2002.28Zenaty D, Aigrain Y, Peuchmaur M, et al.: Medullary thyroid carcinoma identified within the first year of life in children with hereditary multiple endocrine neoplasia type 2A (codon 634) and 2B. Eur J Endocrinol 160 (5): 807-13, 2009.29Decker RA, Peacock ML, Watson P: Hirschsprung disease in MEN 2A: increased spectrum of RET exon 10 genotypes and strong genotype-phenotype correlation. Hum Mol Genet 7 (1): 129-34, 1998.30Eng C, Clayton D, Schuffenecker I, et al.: The relationship between specific RET proto-oncogene mutations and disease phenotype in multiple endocrine neoplasia type 2. International RET mutation consortium analysis. JAMA 276 (19): 1575-9, 1996.31Fialkowski EA, DeBenedetti MK, Moley JF, et al.: RET proto-oncogene testing in infants presenting with Hirschsprung disease identifies 2 new multiple endocrine neoplasia 2A kindreds. J Pediatr Surg 43 (1): 188-90, 2008.32Skába R, Dvoráková S, Václavíková E, et al.: The risk of medullary thyroid carcinoma in patients with Hirschsprung's disease. Pediatr Surg Int 22 (12): 991-5, 2006.33Moore SW, Zaahl MG: Multiple endocrine neoplasia syndromes, children, Hirschsprung's disease and RET. Pediatr Surg Int 24 (5): 521-30, 2008.34Wells SA Jr, Robinson BG, Gagel RF, et al.: Vandetanib in patients with locally advanced or metastatic medullary thyroid cancer: a randomized, double-blind phase III trial. J Clin Oncol 30 (2): 134-41, 2012.35Herbst RS, Heymach JV, O'Reilly MS, et al.: Vandetanib (ZD6474): an orally available receptor tyrosine kinase inhibitor that selectively targets pathways critical for tumor growth and angiogenesis. Expert Opin Investig Drugs 16 (2): 239-49, 2007.36Vidal M, Wells S, Ryan A, et al.: ZD6474 suppresses oncogenic RET isoforms in a Drosophila model for type 2 multiple endocrine neoplasia syndromes and papillary thyroid carcinoma. Cancer Res 65 (9): 3538-41, 2005.37Wilkes D, Charitakis K, Basson CT: Inherited disposition to cardiac myxoma development. Nat Rev Cancer 6 (2): 157-65, 2006.38Carney JA, Young WF: Primary pigmented nodular adrenocortical disease and its associated conditions. Endocrinologist 2: 6-21, 1992.39Ryan MW, Cunningham S, Xiao SY: Maxillary sinus melanoma as the presenting feature of Carney complex. Int J Pediatr Otorhinolaryngol 72 (3): 405-8, 2008.40Lenders JW, Eisenhofer G, Mannelli M, et al.: Phaeochromocytoma. Lancet 366 (9486): 665-75, 2005 Aug 20-26.41Waguespack SG, Rich T, Grubbs E, et al.: A current review of the etiology, diagnosis, and treatment of pediatric pheochromocytoma and paraganglioma. J Clin Endocrinol Metab 95 (5): 2023-37, 2010.42Welander J, Söderkvist P, Gimm O: Genetics and clinical characteristics of hereditary pheochromocytomas and paragangliomas. Endocr Relat Cancer 18 (6): R253-76, 2011.43Timmers HJ, Gimenez-Roqueplo AP, Mannelli M, et al.: Clinical aspects of SDHx-related pheochromocytoma and paraganglioma. Endocr Relat Cancer 16 (2): 391-400, 2009.44Ricketts CJ, Forman JR, Rattenberry E, et al.: Tumor risks and genotype-phenotype-proteotype analysis in 358 patients with germline mutations in SDHB and SDHD. Hum Mutat 31 (1): 41-51, 2010.45Burnichon N, Cascón A, Schiavi F, et al.: MAX mutations cause hereditary and sporadic pheochromocytoma and paraganglioma. Clin Cancer Res 18 (10): 2828-37, 2012.46Stratakis CA, Carney JA: The triad of paragangliomas, gastric stromal tumours and pulmonary chondromas (Carney triad), and the dyad of paragangliomas and gastric stromal sarcomas (Carney-Stratakis syndrome): molecular genetics and clinical implications. J Intern Med 266 (1): 43-52, 2009.47Gill AJ, Benn DE, Chou A, et al.: Immunohistochemistry for SDHB triages genetic testing of SDHB, SDHC, and SDHD in paraganglioma-pheochromocytoma syndromes. Hum Pathol 41 (6): 805-14, 2010.48van Nederveen FH, Gaal J, Favier J, et al.: An immunohistochemical procedure to detect patients with paraganglioma and phaeochromocytoma with germline SDHB, SDHC, or SDHD gene mutations: a retrospective and prospective analysis. Lancet Oncol 10 (8): 764-71, 2009.49Barontini M, Levin G, Sanso G: Characteristics of pheochromocytoma in a 4- to 20-year-old population. Ann N Y Acad Sci 1073: 30-7, 2006.50King KS, Prodanov T, Kantorovich V, et al.: Metastatic pheochromocytoma/paraganglioma related to primary tumor development in childhood or adolescence: significant link to SDHB mutations. J Clin Oncol 29 (31): 4137-42, 2011.51Pham TH, Moir C, Thompson GB, et al.: Pheochromocytoma and paraganglioma in children: a review of medical and surgical management at a tertiary care center. Pediatrics 118 (3): 1109-17, 2006.52Neumann HP, Bausch B, McWhinney SR, et al.: Germ-line mutations in nonsyndromic pheochromocytoma. N Engl J Med 346 (19): 1459-66, 2002.53Lenders JW, Pacak K, Walther MM, et al.: Biochemical diagnosis of pheochromocytoma: which test is best? JAMA 287 (11): 1427-34, 2002.54Eisenhofer G, Pacak K, Huynh TT, et al.: Catecholamine metabolomic and secretory phenotypes in phaeochromocytoma. Endocr Relat Cancer 18 (1): 97-111, 2011.55Eisenhofer G, Timmers HJ, Lenders JW, et al.: Age at diagnosis of pheochromocytoma differs according to catecholamine phenotype and tumor location. J Clin Endocrinol Metab 96 (2): 375-84, 2011.56Timmers HJ, Chen CC, Carrasquillo JA, et al.: Comparison of 18F-fluoro-L-DOPA, 18F-fluoro-deoxyglucose, and 18F-fluorodopamine PET and 123I-MIBG scintigraphy in the localization of pheochromocytoma and paraganglioma. J Clin Endocrinol Metab 94 (12): 4757-67, 2009.57Mora J, Cruz O, Parareda A, et al.: Treatment of disseminated paraganglioma with gemcitabine and docetaxel. Pediatr Blood Cancer 53 (4): 663-5, 2009.58Huang H, Abraham J, Hung E, et al.: Treatment of malignant pheochromocytoma/paraganglioma with cyclophosphamide, vincristine, and dacarbazine: recommendation from a 22-year follow-up of 18 patients. Cancer 113 (8): 2020-8, 2008.59Gonias S, Goldsby R, Matthay KK, et al.: Phase II study of high-dose [131I]metaiodobenzylguanidine therapy for patients with metastatic pheochromocytoma and paraganglioma. J Clin Oncol 27 (25): 4162-8, 2009.60Sasson M, Mallory SB: Malignant primary skin tumors in children. Curr Opin Pediatr 8 (4): 372-7, 1996.61Barnhill RL: Childhood melanoma. Semin Diagn Pathol 15 (3): 189-94, 1998.62Fishman C, Mihm MC Jr, Sober AJ: Diagnosis and management of nevi and cutaneous melanoma in infants and children. Clin Dermatol 20 (1): 44-50, 2002 Jan-Feb.63Hamre MR, Chuba P, Bakhshi S, et al.: Cutaneous melanoma in childhood and adolescence. Pediatr Hematol Oncol 19 (5): 309-17, 2002 Jul-Aug.64Ceballos PI, Ruiz-Maldonado R, Mihm MC Jr: Melanoma in children. N Engl J Med 332 (10): 656-62, 1995.65Schmid-Wendtner MH, Berking C, Baumert J, et al.: Cutaneous melanoma in childhood and adolescence: an analysis of 36 patients. J Am Acad Dermatol 46 (6): 874-9, 2002.66Pappo AS: Melanoma in children and adolescents. Eur J Cancer 39 (18): 2651-61, 2003.67Huynh PM, Grant-Kels JM, Grin CM: Childhood melanoma: update and treatment. Int J Dermatol 44 (9): 715-23, 2005.68Christenson LJ, Borrowman TA, Vachon CM, et al.: Incidence of basal cell and squamous cell carcinomas in a population younger than 40 years. JAMA 294 (6): 681-90, 2005.69Moscarella E, Zalaudek I, Cerroni L, et al.: Excised melanocytic lesions in children and adolescents - a 10-year survey. Br J Dermatol 167 (2): 368-73, 2012.70Bleyer A, O’Leary M, Barr R, et al., eds.: Cancer Epidemiology in Older Adolescents and Young Adults 15 to 29 Years of Age, Including SEER Incidence and Survival: 1975-2000. Bethesda, Md: National Cancer Institute, 2006. NIH Pub. No. 06-5767. Also available online. Last accessed April 04, 2013.71Horner MJ, Ries LA, Krapcho M, et al.: SEER Cancer Statistics Review, 1975-2006. Bethesda, Md: National Cancer Institute, 2009. Also available online. Last accessed April 04, 2013.72Shibuya H, Kato A, Kai N, et al.: A case of Werner syndrome with three primary lesions of malignant melanoma. J Dermatol 32 (9): 737-44, 2005.73Kleinerman RA, Yu CL, Little MP, et al.: Variation of second cancer risk by family history of retinoblastoma among long-term survivors. J Clin Oncol 30 (9): 950-7, 2012.74Pappo AS, Kaste SC, Rao BN, et al.: Childhood melanoma. In: Balch CM, Houghton AN, Sober AJ, et al., eds.: Cutaneous Melanoma. 3rd ed., St. Louis, Mo: Quality Medical Publishing Inc., 1998, pp 175-186.75Heffernan AE, O'Sullivan A: Pediatric sun exposure. Nurse Pract 23 (7): 67-8, 71-8, 83-6, 1998.76Berg P, Lindelöf B: Differences in malignant melanoma between children and adolescents. A 35-year epidemiological study. Arch Dermatol 133 (3): 295-7, 1997.77Elwood JM, Jopson J: Melanoma and sun exposure: an overview of published studies. Int J Cancer 73 (2): 198-203, 1997.78Strouse JJ, Fears TR, Tucker MA, et al.: Pediatric melanoma: risk factor and survival analysis of the surveillance, epidemiology and end results database. J Clin Oncol 23 (21): 4735-41, 2005.79Whiteman DC, Valery P, McWhirter W, et al.: Risk factors for childhood melanoma in Queensland, Australia. Int J Cancer 70 (1): 26-31, 1997.80Tucker MA, Fraser MC, Goldstein AM, et al.: A natural history of melanomas and dysplastic nevi: an atlas of lesions in melanoma-prone families. Cancer 94 (12): 3192-209, 2002.81Ducharme EE, Silverberg NB: Pediatric malignant melanoma: an update on epidemiology, detection, and prevention. Cutis 84 (4): 192-8, 2009.82Hale EK, Stein J, Ben-Porat L, et al.: Association of melanoma and neurocutaneous melanocytosis with large congenital melanocytic naevi--results from the NYU-LCMN registry. Br J Dermatol 152 (3): 512-7, 2005.83Makkar HS, Frieden IJ: Neurocutaneous melanosis. Semin Cutan Med Surg 23 (2): 138-44, 2004.84Paradela S, Fonseca E, Pita-Fernández S, et al.: Prognostic factors for melanoma in children and adolescents: a clinicopathologic, single-center study of 137 Patients. Cancer 116 (18): 4334-44, 2010.85Lange JR, Palis BE, Chang DC, et al.: Melanoma in children and teenagers: an analysis of patients from the National Cancer Data Base. J Clin Oncol 25 (11): 1363-8, 2007.86Rao BN, Hayes FA, Pratt CB, et al.: Malignant melanoma in children: its management and prognosis. J Pediatr Surg 25 (2): 198-203, 1990.87Aldrink JH, Selim MA, Diesen DL, et al.: Pediatric melanoma: a single-institution experience of 150 patients. J Pediatr Surg 44 (8): 1514-21, 2009.88Tcheung WJ, Marcello JE, Puri PK, et al.: Evaluation of 39 cases of pediatric cutaneous head and neck melanoma. J Am Acad Dermatol 65 (2): e37-42, 2011.89Gibbs P, Moore A, Robinson W, et al.: Pediatric melanoma: are recent advances in the management of adult melanoma relevant to the pediatric population. J Pediatr Hematol Oncol 22 (5): 428-32, 2000 Sep-Oct.90Livestro DP, Kaine EM, Michaelson JS, et al.: Melanoma in the young: differences and similarities with adult melanoma: a case-matched controlled analysis. Cancer 110 (3): 614-24, 2007.91Lohmann CM, Coit DG, Brady MS, et al.: Sentinel lymph node biopsy in patients with diagnostically controversial spitzoid melanocytic tumors. Am J Surg Pathol 26 (1): 47-55, 2002.92Su LD, Fullen DR, Sondak VK, et al.: Sentinel lymph node biopsy for patients with problematic spitzoid melanocytic lesions: a report on 18 patients. Cancer 97 (2): 499-507, 2003.93Howman-Giles R, Shaw HM, Scolyer RA, et al.: Sentinel lymph node biopsy in pediatric and adolescent cutaneous melanoma patients. Ann Surg Oncol 17 (1): 138-43, 2010.94Moore-Olufemi S, Herzog C, Warneke C, et al.: Outcomes in pediatric melanoma: comparing prepubertal to adolescent pediatric patients. Ann Surg 253 (6): 1211-5, 2011.95Shah NC, Gerstle JT, Stuart M, et al.: Use of sentinel lymph node biopsy and high-dose interferon in pediatric patients with high-risk melanoma: the Hospital for Sick Children experience. J Pediatr Hematol Oncol 28 (8): 496-500, 2006.96Kayton ML, La Quaglia MP: Sentinel node biopsy for melanocytic tumors in children. Semin Diagn Pathol 25 (2): 95-9, 2008.97Ariyan CE, Coit DG: Clinical aspects of sentinel lymph node biopsy in melanoma. Semin Diagn Pathol 25 (2): 86-94, 2008.98Pacella SJ, Lowe L, Bradford C, et al.: The utility of sentinel lymph node biopsy in head and neck melanoma in the pediatric population. Plast Reconstr Surg 112 (5): 1257-65, 2003.99Navid F, Furman WL, Fleming M, et al.: The feasibility of adjuvant interferon alpha-2b in children with high-risk melanoma. Cancer 103 (4): 780-7, 2005.100Chao MM, Schwartz JL, Wechsler DS, et al.: High-risk surgically resected pediatric melanoma and adjuvant interferon therapy. Pediatr Blood Cancer 44 (5): 441-8, 2005.101Kirkwood JM, Strawderman MH, Ernstoff MS, et al.: Interferon alfa-2b adjuvant therapy of high-risk resected cutaneous melanoma: the Eastern Cooperative Oncology Group Trial EST 1684. J Clin Oncol 14 (1): 7-17, 1996.102Roaten JB, Partrick DA, Bensard D, et al.: Survival in sentinel lymph node-positive pediatric melanoma. J Pediatr Surg 40 (6): 988-92; discussion 992, 2005.103Ludgate MW, Fullen DR, Lee J, et al.: The atypical Spitz tumor of uncertain biologic potential: a series of 67 patients from a single institution. Cancer 115 (3): 631-41, 2009.104Busam KJ, Murali R, Pulitzer M, et al.: Atypical spitzoid melanocytic tumors with positive sentinel lymph nodes in children and teenagers, and comparison with histologically unambiguous and lethal melanomas. Am J Surg Pathol 33 (9): 1386-95, 2009.105Berk DR, LaBuz E, Dadras SS, et al.: Melanoma and melanocytic tumors of uncertain malignant potential in children, adolescents and young adults--the Stanford experience 1995-2008. Pediatr Dermatol 27 (3): 244-54, 2010 May-Jun.106Cerroni L, Barnhill R, Elder D, et al.: Melanocytic tumors of uncertain malignant potential: results of a tutorial held at the XXIX Symposium of the International Society of Dermatopathology in Graz, October 2008. Am J Surg Pathol 34 (3): 314-26, 2010.107Gill M, Renwick N, Silvers DN, et al.: Lack of BRAF mutations in Spitz nevi. J Invest Dermatol 122 (5): 1325-6, 2004.108Bastian BC, Wesselmann U, Pinkel D, et al.: Molecular cytogenetic analysis of Spitz nevi shows clear differences to melanoma. J Invest Dermatol 113 (6): 1065-9, 1999.109Gerami P, Jewell SS, Morrison LE, et al.: Fluorescence in situ hybridization (FISH) as an ancillary diagnostic tool in the diagnosis of melanoma. Am J Surg Pathol 33 (8): 1146-56, 2009.110Massi D, Cesinaro AM, Tomasini C, et al.: Atypical Spitzoid melanocytic tumors: a morphological, mutational, and FISH analysis. J Am Acad Dermatol 64 (5): 919-35, 2011.111van Engen-van Grunsven AC, van Dijk MC, Ruiter DJ, et al.: HRAS-mutated Spitz tumors: A subtype of Spitz tumors with distinct features. Am J Surg Pathol 34 (10): 1436-41, 2010.112Blokx WA, van Dijk MC, Ruiter DJ: Molecular cytogenetics of cutaneous melanocytic lesions - diagnostic, prognostic and therapeutic aspects. Histopathology 56 (1): 121-32, 2010.113Takata M, Saida T: Genetic alterations in melanocytic tumors. J Dermatol Sci 43 (1): 1-10, 2006.114Mu E, Lange JR, Strouse JJ: Comparison of the use and results of sentinel lymph node biopsy in children and young adults with melanoma. Cancer 118 (10): 2700-7, 2012.115Kirkwood JM, Manola J, Ibrahim J, et al.: A pooled analysis of eastern cooperative oncology group and intergroup trials of adjuvant high-dose interferon for melanoma. Clin Cancer Res 10 (5): 1670-7, 2004.116Gogas HJ, Kirkwood JM, Sondak VK: Chemotherapy for metastatic melanoma: time for a change? Cancer 109 (3): 455-64, 2007.117Eton O, Legha SS, Bedikian AY, et al.: Sequential biochemotherapy versus chemotherapy for metastatic melanoma: results from a phase III randomized trial. J Clin Oncol 20 (8): 2045-52, 2002.118Middleton MR, Grob JJ, Aaronson N, et al.: Randomized phase III study of temozolomide versus dacarbazine in the treatment of patients with advanced metastatic malignant melanoma. J Clin Oncol 18 (1): 158-66, 2000.119Chapman PB, Hauschild A, Robert C, et al.: Improved survival with vemurafenib in melanoma with BRAF V600E mutation. N Engl J Med 364 (26): 2507-16, 2011.120Hodi FS, O'Day SJ, McDermott DF, et al.: Improved survival with ipilimumab in patients with metastatic melanoma. N Engl J Med 363 (8): 711-23, 2010.121Efron PA, Chen MK, Glavin FL, et al.: Pediatric basal cell carcinoma: case reports and literature review. J Pediatr Surg 43 (12): 2277-80, 2008.122Griffin JR, Cohen PR, Tschen JA, et al.: Basal cell carcinoma in childhood: case report and literature review. J Am Acad Dermatol 57 (5 Suppl): S97-102, 2007.123Gorlin RJ: Nevoid basal cell carcinoma syndrome. Dermatol Clin 13 (1): 113-25, 1995.124Kimonis VE, Goldstein AM, Pastakia B, et al.: Clinical manifestations in 105 persons with nevoid basal cell carcinoma syndrome. Am J Med Genet 69 (3): 299-308, 1997.125Amlashi SF, Riffaud L, Brassier G, et al.: Nevoid basal cell carcinoma syndrome: relation with desmoplastic medulloblastoma in infancy. A population-based study and review of the literature. Cancer 98 (3): 618-24, 2003.126Veenstra-Knol HE, Scheewe JH, van der Vlist GJ, et al.: Early recognition of basal cell naevus syndrome. Eur J Pediatr 164 (3): 126-30, 2005.127Caro I, Low JA: The role of the hedgehog signaling pathway in the development of basal cell carcinoma and opportunities for treatment. Clin Cancer Res 16 (13): 3335-9, 2010.128Von Hoff DD, LoRusso PM, Rudin CM, et al.: Inhibition of the hedgehog pathway in advanced basal-cell carcinoma. N Engl J Med 361 (12): 1164-72, 2009.129Sekulic A, Migden MR, Oro AE, et al.: Efficacy and safety of vismodegib in advanced basal-cell carcinoma. N Engl J Med 366 (23): 2171-9, 2012.130Tang JY, Mackay-Wiggan JM, Aszterbaum M, et al.: Inhibiting the hedgehog pathway in patients with the basal-cell nevus syndrome. N Engl J Med 366 (23): 2180-8, 2012.131Hoch BL, Nielsen GP, Liebsch NJ, et al.: Base of skull chordomas in children and adolescents: a clinicopathologic study of 73 cases. Am J Surg Pathol 30 (7): 811-8, 2006.132McMaster ML, Goldstein AM, Bromley CM, et al.: Chordoma: incidence and survival patterns in the United States, 1973-1995. Cancer Causes Control 12 (1): 1-11, 2001.133Coffin CM, Swanson PE, Wick MR, et al.: Chordoma in childhood and adolescence. A clinicopathologic analysis of 12 cases. Arch Pathol Lab Med 117 (9): 927-33, 1993.134Borba LA, Al-Mefty O, Mrak RE, et al.: Cranial chordomas in children and adolescents. J Neurosurg 84 (4): 584-91, 1996.135Jian BJ, Bloch OG, Yang I, et al.: A comprehensive analysis of intracranial chordoma and survival: a systematic review. Br J Neurosurg 25 (4): 446-53, 2011.136Yasuda M, Bresson D, Chibbaro S, et al.: Chordomas of the skull base and cervical spine: clinical outcomes associated with a multimodal surgical resection combined with proton-beam radiation in 40 patients. Neurosurg Rev 35 (2): 171-82; discussion 182-3, 2012.137McMaster ML, Goldstein AM, Parry DM: Clinical features distinguish childhood chordoma associated with tuberous sclerosis complex (TSC) from chordoma in the general paediatric population. J Med Genet 48 (7): 444-9, 2011.138Hug EB, Sweeney RA, Nurre PM, et al.: Proton radiotherapy in management of pediatric base of skull tumors. Int J Radiat Oncol Biol Phys 52 (4): 1017-24, 2002.139Noël G, Habrand JL, Jauffret E, et al.: Radiation therapy for chordoma and chondrosarcoma of the skull base and the cervical spine. Prognostic factors and patterns of failure. Strahlenther Onkol 179 (4): 241-8, 2003.140Rutz HP, Weber DC, Goitein G, et al.: Postoperative spot-scanning proton radiation therapy for chordoma and chondrosarcoma in children and adolescents: initial experience at paul scherrer institute. Int J Radiat Oncol Biol Phys 71 (1): 220-5, 2008.141Casali PG, Messina A, Stacchiotti S, et al.: Imatinib mesylate in chordoma. Cancer 101 (9): 2086-97, 2004.142Stacchiotti S, Longhi A, Ferraresi V, et al.: Phase II study of imatinib in advanced chordoma. J Clin Oncol 30 (9): 914-20, 2012.143Lindén O, Stenberg L, Kjellén E: Regression of cervical spinal cord compression in a patient with chordoma following treatment with cetuximab and gefitinib. Acta Oncol 48 (1): 158-9, 2009.144Singhal N, Kotasek D, Parnis FX: Response to erlotinib in a patient with treatment refractory chordoma. Anticancer Drugs 20 (10): 953-5, 2009.145Stacchiotti S, Marrari A, Tamborini E, et al.: Response to imatinib plus sirolimus in advanced chordoma. Ann Oncol 20 (11): 1886-94, 2009.146Kuttesch JF Jr, Parham DM, Kaste SC, et al.: Embryonal malignancies of unknown primary origin in children. Cancer 75 (1): 115-21, 1995.147Pavlidis N, Pentheroudakis G: Cancer of unknown primary site. Lancet 379 (9824): 1428-35, 2012.148Bohuslavizki KH, Klutmann S, Kröger S, et al.: FDG PET detection of unknown primary tumors. J Nucl Med 41 (5): 816-22, 2000.149Han A, Xue J, Hu M, et al.: Clinical value of 18F-FDG PET-CT in detecting primary tumor for patients with carcinoma of unknown primary. Cancer Epidemiol 36 (5): 470-5, 2012.150Varadhachary GR, Talantov D, Raber MN, et al.: Molecular profiling of carcinoma of unknown primary and correlation with clinical evaluation. J Clin Oncol 26 (27): 4442-8, 2008.151Pentheroudakis G, Greco FA, Pavlidis N: Molecular assignment of tissue of origin in cancer of unknown primary may not predict response to therapy or outcome: a systematic literature review. Cancer Treat Rev 35 (3): 221-7, 2009.
Changes to This Summary (04/04/2013)
The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.
Head and Neck Cancers
Added text to state that recent reports suggest that positron emission tomography–computed tomography (PET-CT) may aid in staging esthesioneuroblastoma (cited Broski et al. as reference 30).
Added Redlich et al. as reference 67 and Fu et al. as reference 128.
Added Venkatramani et al. as reference 56 and Yalçin et al. as reference 68.
Revised text to state that the most common primary benign heart tumors in children are rhabdomyomas, myxomas, teratomas, and fibromas (cited Becker and Padalino et al. as references 81 and 82, respectively). Also revised text to state that other benign tumors include histiocytoid cardiomyopathy tumors, hemangiomas, and neurofibromas (i.e., tumors of the nerves that innervate the muscles).
Added text to state that hypomethylation of the KCNQ1OT1 gene has also been associated with the development of adrenocortical tumors in patients without the phenotypic features of Beckwith-Wiedemann syndrome (cited Wijnen et al. as reference 15).
Added Speer et al. as reference 65 and level of evidence 3iiDiii.
Added text to state that in contrast to juvenile granulosa cell tumors, a recent study suggested that Sertoli-Leydig tumors with abdominal spillage should be treated with cisplatin-based chemotherapy.
Other Rare Childhood Cancers
Added Burnichon et al. as reference 45.
Revised Table 7 to state that MAX germline mutations account for less than 2% of all paragangliomas and pheochromocytomas, and the mean age at presentation is 34 years.
This summary is written and maintained by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of NCI. The summary reflects an independent review of the literature and does not represent a policy statement of NCI or NIH. More information about summary policies and the role of the PDQ Editorial Boards in maintaining the PDQ summaries can be found on the About This PDQ Summary and PDQ NCI's Comprehensive Cancer Database pages.
About This PDQ Summary
Purpose of This Summary
This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about the treatment of unusual cancers of childhood. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.
Reviewers and Updates
This summary is reviewed regularly and updated as necessary by the PDQ Pediatric Treatment Editorial Board, which is editorially independent of the National Cancer Institute (NCI). The summary reflects an independent review of the literature and does not represent a policy statement of NCI or the National Institutes of Health (NIH).
Board members review recently published articles each month to determine whether an article should:
- be discussed at a meeting,
- be cited with text, or
- replace or update an existing article that is already cited.
Changes to the summaries are made through a consensus process in which Board members evaluate the strength of the evidence in the published articles and determine how the article should be included in the summary.
The lead reviewers for Unusual Cancers of Childhood Treatment are:
- Karen Jean Marcus, MD (Dana-Farber Cancer Institute/Boston Children's Hospital)
- Paul A. Meyers, MD (Memorial Sloan-Kettering Cancer Center)
- Thomas A. Olson, MD (AFLAC Cancer Center and Blood Disorders Service of Children's Healthcare of Atlanta - Egleston Campus)
- Alberto S. Pappo, MD (St. Jude Children's Research Hospital)
- R. Beverly Raney, MD (Consultant)
- Arthur Kim Ritchey, MD (Children's Hospital of Pittsburgh of UPMC)
- Carlos Rodriguez-Galindo, MD (Dana-Farber Cancer Institute/Boston Children's Hospital)
- Stephen J. Shochat, MD (St. Jude Children's Research Hospital)
Any comments or questions about the summary content should be submitted to Cancer.gov through the Web site's Contact Form. Do not contact the individual Board Members with questions or comments about the summaries. Board members will not respond to individual inquiries.
Levels of Evidence
Some of the reference citations in this summary are accompanied by a level-of-evidence designation. These designations are intended to help readers assess the strength of the evidence supporting the use of specific interventions or approaches. The PDQ Pediatric Treatment Editorial Board uses a formal evidence ranking system in developing its level-of-evidence designations.
Permission to Use This Summary
PDQ is a registered trademark. Although the content of PDQ documents can be used freely as text, it cannot be identified as an NCI PDQ cancer information summary unless it is presented in its entirety and is regularly updated. However, an author would be permitted to write a sentence such as “NCI’s PDQ cancer information summary about breast cancer prevention states the risks succinctly: [include excerpt from the summary].”
The preferred citation for this PDQ summary is:
National Cancer Institute: PDQ® Unusual Cancers of Childhood Treatment. Bethesda, MD: National Cancer Institute. Date last modified <MM/DD/YYYY>. Available at: http://cancer.gov/cancertopics/pdq/treatment/unusual-cancers-childhood/HealthProfessional. Accessed <MM/DD/YYYY>.
Images in this summary are used with permission of the author(s), artist, and/or publisher for use within the PDQ summaries only. Permission to use images outside the context of PDQ information must be obtained from the owner(s) and cannot be granted by the National Cancer Institute. Information about using the illustrations in this summary, along with many other cancer-related images, is available in Visuals Online, a collection of over 2,000 scientific images.
Based on the strength of the available evidence, treatment options may be described as either “standard” or “under clinical evaluation.” These classifications should not be used as a basis for insurance reimbursement determinations. More information on insurance coverage is available on Cancer.gov on the Coping with Cancer: Financial, Insurance, and Legal Information page.
More information about contacting us or receiving help with the Cancer.gov Web site can be found on our Contact Us for Help page. Questions can also be submitted to Cancer.gov through the Web site’s Contact Form.
Get More Information From NCI
For more information, U.S. residents may call the National Cancer Institute's (NCI's) Cancer Information Service toll-free at 1-800-4-CANCER (1-800-422-6237) Monday through Friday from 8:00 a.m. to 8:00 p.m., Eastern Time. A trained Cancer Information Specialist is available to answer your questions.
The NCI's LiveHelp® online chat service provides Internet users with the ability to chat online with an Information Specialist. The service is available from 8:00 a.m. to 11:00 p.m. Eastern time, Monday through Friday. Information Specialists can help Internet users find information on NCI Web sites and answer questions about cancer.
Write to us
For more information from the NCI, please write to this address:
- NCI Public Inquiries Office
- 9609 Medical Center Dr.
- Room 2E532 MSC 9760
- Bethesda, MD 20892-9760
Search the NCI Web site
The NCI Web site provides online access to information on cancer, clinical trials, and other Web sites and organizations that offer support and resources for cancer patients and their families. For a quick search, use the search box in the upper right corner of each Web page. The results for a wide range of search terms will include a list of "Best Bets," editorially chosen Web pages that are most closely related to the search term entered.
There are also many other places to get materials and information about cancer treatment and services. Hospitals in your area may have information about local and regional agencies that have information on finances, getting to and from treatment, receiving care at home, and dealing with problems related to cancer treatment.
The NCI has booklets and other materials for patients, health professionals, and the public. These publications discuss types of cancer, methods of cancer treatment, coping with cancer, and clinical trials. Some publications provide information on tests for cancer, cancer causes and prevention, cancer statistics, and NCI research activities. NCI materials on these and other topics may be ordered online or printed directly from the NCI Publications Locator. These materials can also be ordered by telephone from the Cancer Information Service toll-free at 1-800-4-CANCER (1-800-422-6237).
This information was last updated on 2013-04-04