title: [Subungual keratoacanthoma].
abstract: Subungual keratoacanthoma is a very rare condition that varies in its clinical presentation from keratoacanthoma in other localizations. It is a painful lesion that fails to regress spontaneously and shows more vertical growth. On X-ray examination destruction of the underlying bone, caused by pressure, can be seen. It may be difficult to distinguish subungual keratoacanthoma from other subungual tumors, especially squamous cell carcinoma; therefore clinical and histological data should be taken into consideration.
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000473:pathology; D003937:Diagnosis, Differential; D004848:Epithelium / Q000473:pathology; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009260:Nail Diseases / Q000473:pathology*; D009262:Nails / Q000473:pathology; D010014:Osteolysis / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology
vernacular_title: Subunguales Keratoakanthom.