A Case of Subungual Keratoacanthoma

Abstract

A 44-year-old Japanese woman was seen in August 2005 for pain and onycholysis of her right thumb of 5 months′ duration. The nail plate was removed under block anesthesia and the lesion was excised. Histological examination showed marked hyperkeratosis with acanthosis. Numerous eosinophilic dyskeratotic cells were scattered throughout the cell layers. There was no significant dysplasia. The patient recovered fully without recurrence.