The rectum and anal canal.
D001003:Anal Canal / Q000601:surgery*; D007172:Erectile Dysfunction / Q000209:etiology; D005242:Fecal Incontinence / Q000209:etiology; D005401:Fissure in Ano / Q000601:surgery; D006484:Hemorrhoids / Q000601:surgery; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D012003:Rectal Fistula / Q000601:surgery; D012007:Rectum / Q000601:surgery*