Biopsy (proctology).
D001706:Biopsy; D003107:Colorectal Surgery / Q000473:pathology*; D013505:Digestive System Surgical Procedures; D004724:Endoscopy; D006801:Humans; D007422:Intestines; D012007:Rectum / Q000473:pathology*
PROCTOLOGY/biopsy; RECTUM/biopsy