Cellular neurothekeoma occurring at the site of radiation therapy in a child with medulloblastoma.

Cellular neurothekeoma is a rare, benign cutaneous neoplasm. We report a case of cellular neurothekeoma arising on the mid-back of a 10-year-old boy within the previous radiation therapy field for medulloblastoma. Clinical features of cellular neurothekeoma in children are similar to those in adults, except that there have been no reports of local recurrence in children following surgical excision, and the presence of atypical histological features does not predict clinical behavior. Recognition of this entity in children is important to avoid misdiagnosis and overly aggressive treatments.