Malignant degeneration of an epithelial nevus.
D002081:Buttocks; D002294:Carcinoma, Squamous Cell / Q000209:etiology* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009506:Nevus / Q000150:complications* / Q000151:congenital / Q000473:pathology; D012878:Skin Neoplasms / Q000209:etiology* / Q000473:pathology; D013848:Thigh