title: Anal cancer. With special reference to the cloacogenic variety.
mesh_terms: D001003:Anal Canal / Q000196:embryology*; D001005:Anus Neoplasms / Q000145:classification / Q000175:diagnosis / Q000196:embryology* / Q000532:radiotherapy / Q000601:surgery; D002294:Carcinoma, Squamous Cell; D006801:Humans; D009362:Neoplasm Metastasis; D012004:Rectal Neoplasms; D012007:Rectum / Q000196:embryology