Onychopapilloma: a rare cause of longitudinal melanonychia. Usually benign (but not always). A case report

Abstract

Abstract We recently treated a patient who presented with a hyperpigmented longitudinal stripe of the thumb nailbed which was biopsied with a histopathologic diagnosis of onychopapilloma. We have not seen onychopapilloma reported in the hand surgery literature. Onychopapilloma is generally benign but a malignant variant has recently been reported.