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Gastric Schwannoma Without Neurofibromatosis in a 16-Year-Old Adolescent.

BACKGROUND Schwannomas are benign, slowgrowing, encapsulated nerve-sheath tumors arising from Schwann cells. Gastric schwannomas occur more frequently in female patients in the fifth to the sixth decades of life and account for only 0.2% of all gastric tumors and 4% of all benign gastric neoplasms in adulthood. Schwannomas are rare in children without neurofibromatosis (NF).1–3 We describe a 16-year-old female patient diagnosed with gastric schwannoma.