Anesthesia for anorectal and colonic surgery.
D001003:Anal Canal / Q000601:surgery*; D000758:Anesthesia; D003106:Colon / Q000601:surgery*; D013505:Digestive System Surgical Procedures; D007420:Intestine, Large; D012007:Rectum / Q000601:surgery*
ANESTHESIA; ANUS/surgery; COLON/surgery; RECTUM/surgery