Sphincter-saving operations for cancer of the rectum.
D001003:Anal Canal / Q000033:anatomy & histology / Q000502:physiology*; D006801:Humans; D007417:Intestinal Polyps / Q000601:surgery; D008722:Methods; D009132:Muscles / Q000033:anatomy & histology / Q000502:physiology; D012004:Rectal Neoplasms / Q000601:surgery*; D012007:Rectum / Q000601:surgery