title: Adenocarcinoma of the sigmoid colon with focal choriocarcinoma metaplasia: a case report.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000368:Aged; D002822:Choriocarcinoma / Q000097:blood / Q000473:pathology*; D006063:Chorionic Gonadotropin / Q000097:blood; D006801:Humans; D008113:Liver Neoplasms / Q000556:secondary; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D012811:Sigmoid Neoplasms / Q000097:blood / Q000473:pathology*
chemical_list: D006063:Chorionic Gonadotropin