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NCI Dictionary of Cancer Terms

distal colon  listen  (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).

Distal colon; drawing shows parts of the distal colon, including the descending colon and sigmoid colon.