Crohn's disease and carcinoma of the rectum.
D000038:Abscess; D000230:Adenocarcinoma / Q000209:etiology*; D000293:Adolescent; D000328:Adult; D001344:Autopsy; D003082:Colectomy; D003424:Crohn Disease / Q000150:complications*; D005401:Fissure in Ano / Q000150:complications; D005500:Follow-Up Studies; D006801:Humans; D007082:Ileum / Q000601:surgery; D008297:Male; D010385:Pelvic Exenteration; D012004:Rectal Neoplasms / Q000209:etiology*