Pediatric non-nasopharyngeal head and neck squamous cell carcinoma: Analysis of the Surveillance, Epidemiology, and End Results (SEER) program with review of the literature.
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BACKGROUND: Despite its prevalence in adults, head and neck squamous cell carcinoma (HNSCC) is considered a rare entity in pediatrics where lymphomas, neural tumors, and soft tissue sarcomas predominate in the head and neck. Given the association of squamous cell carcinoma with the human papillomavirus, a risk factor that may be present from birth, and the difficulties in staging this disease for prognostication in children, it is important to revisit nationally collected data for prevalence and outcomes assessments. OBJECTIVE: To examine a publicly available national database to describe the incidence, pathology, treatment, and survival of pediatric HNSCC. To review the available literature regarding management, outcomes, and risk factors for this disease process. METHODS: The National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) tumor database was queried to identify pediatric subjects ages 0 to 19 diagnosed HNSCC between 1973 and 2019. RESULTS: Two-hundred ninety-two cases were identified. Subjects were 62.7 % male (n = 183) and the average age was 15.4 years (range 2-19, median 16). Subjects were 65.8 % white (n = 192), 22.9 % black (n = 67), 8.9 % Asian/Pacific Islander (n = 26), 1 % American Indian (n = 3), and 1.4 % unknown (n = 4). The most common primary sites were nasopharynx (45.9 %), oral cavity (30.5 %), larynx (8.6 %), salivary gland (4.1 %), nasal cavity & paranasal sinus (3.4 %), and lip (2.7 %). There was no statistically significant difference between primary subsite and age, race, histologic grade, or extent of disease. The 5-year overall survival was 83.6 %. DISCUSSION: Head and neck squamous cell carcinoma is more likely to present in older children and is more prevalent in White populations. The nasopharynx is the most common subsite involved, which differs from adult populations in which non-nasopharyngeal subsites including the larynx, oral cavity, and oropharynx are most frequently affected. CONCLUSION: Head and neck squamous cell carcinoma is rare in pediatric patients but should not be overlooked by physicians in the differential diagnosis, particularly in teenagers. Further study is needed to determine whether this represents a unique entity or can be staged and treated according to adult guidelines.