Solitary keratoacanthoma of the lip.
D000328:Adult; D002294:Carcinoma, Squamous Cell / Q000473:pathology; D003937:Diagnosis, Differential; D006560:Herpes Labialis / Q000473:pathology; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology*; D008047:Lip Diseases / Q000473:pathology*; D008048:Lip Neoplasms / Q000473:pathology; D008297:Male; D008875:Middle Aged