title: Carcinomas of the anorectal region of extramucosal origin with special reference to the anal ducts.
mesh_terms: D000230:Adenocarcinoma; D002288:Adenocarcinoma, Mucinous; D000368:Aged; D000694:Anal Gland Neoplasms; D000818:Animals; D001005:Anus Neoplasms / Q000175:diagnosis / Q000601:surgery; D001706:Biopsy; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000175:diagnosis / Q000601:surgery; D003937:Diagnosis, Differential; D006484:Hemorrhoids / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009092:Mucous Membrane; D012004:Rectal Neoplasms