title: Squamous cell carcinoma following fluorouracil-responsive 'keratoacanthoma'.
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000473:pathology*; D003951:Diagnostic Errors; D005472:Fluorouracil / Q000627:therapeutic use*; D006801:Humans; D007636:Keratoacanthoma / Q000188:drug therapy*; D008297:Male; D012871:Skin Diseases / Q000188:drug therapy*; D012878:Skin Neoplasms / Q000473:pathology*
chemical_list: D005472:Fluorouracil