title: Calcifying neurothekeoma.
abstract: A 10-mm, asymptomatic, slowly growing, dermal nodule was present on the ankle of a 62-year-old man for 6 months. Histologically, the nodule was shown to be a neurothekeoma, a recently described benign cutaneous tumor of nerve sheath origin distinct from neurofibroma or neurilemmoma. This case merits attention because extensive dystrophic tumoral calcification in the lobules prompted an initial misdiagnosis of foreign body granuloma. Calcification in neurothekeoma has not previously been described.
mesh_terms: D000842:Ankle; D002114:Calcinosis / Q000175:diagnosis / Q000473:pathology*; D003951:Diagnostic Errors; D006801:Humans; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis / Q000473:pathology*; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis / Q000473:pathology*; D009626:Terminology as Topic