title: Subungual keratoacanthoma.
mesh_terms: D000671:Amputation, Surgical; D001847:Bone Diseases / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D013933:Thumb / Q000473:pathology / Q000601:surgery