distal colonListen to pronunciation(DIS-tul KOH-lun)The last part of the colon. The distal colon includes the descending colon (the left side of the colon) and the sigmoid colon (the S-shaped section of the colon that connects to the rectum).Enlarge this image in new windowThe distal colon includes the descending colon and the sigmoid colon.Search NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#