Definition: The distal segment of the LARGE INTESTINE, between the SIGMOID COLON and the ANAL CANAL.
/surg: do not confuse with the specialty COLORECTAL SURGERY; rectal bleeding: RECTUM (NIM) + HEMORRHAGE, GASTROINTESTINAL (IM) for bleeding through the rectum; hemorrhaging rectum is RECTAL DISEASES (IM) + HEMORRHAGE, GASTROINTESTINAL (IM); inflammation
consider also terms at PROCT-