Incidence and clinical characteristics of pediatric ocular tumors in a Midwestern US population.

ABSTRACT

PURPOSE: To investigate the incidence and clinical characteristics of pediatric ocular tumors in a US Midwestern county population. METHODS: Retrospective population-based cohort study of all Olmsted County, Minnesota, pediatric patients (<18 years old) diagnosed with any ocular neoplasm from January 1, 2006, to December 31, 2015. Subjects were identified via the Rochester Epidemiology Project, a record-linkage system that captures virtually all medical care provided in this county. Medical records were reviewed to confirm diagnoses. Age- and sex-adjusted incidence rates were calculated and adjusted to the 2010 Olmsted County, Minnesota, pediatric population. RESULTS: There were 87 incident pediatric ocular tumor diagnoses, yielding an overall age- and sex-adjusted incidence rate of 24.0 per 100,000 per year (95% CI, 19.0-29.1). Females accounted for 46 cases (53%) cases, and 62 (85%) were White. Incidence rate for ocular tumors overall did not differ by patient age (P = 0.08) or sex (P = 0.47). All tumors were benign lesions. The most frequent adnexal/orbital, ocular surface, and intraocular tumors were epidermal inclusion cyst in 18 (21%) cases, conjunctival nevus in 10 (12%), and choroidal nevus in 18 (21%), respectively. The mean follow-up duration was 25.5 months (range, 7 days to 138.6 months), and benign tumor growth occurred in one conjunctival nevus. There were no cases of malignant transformation. CONCLUSIONS: Pediatric ocular tumors were rare with an estimated incidence of approximately 1 in 4,200 pediatric patients in Olmsted County, Minnesota. All lesions were benign, with benign growth in only 1% of cases, and no tumors underwent malignant transformation.