Surgical conditions of the rectum and anal canal. I. Causes, diagnosis and preparation for major surgery.
D001003:Anal Canal; D006801:Humans; D011300:Preoperative Care; D011351:Proctoscopy; D012007:Rectum; D012812:Sigmoidoscopy
ANUS; PREOPERATIVE CARE; PROCTOSCOPY; RECTUM; SIGMOIDOSCOPY