Español
Questions About Cancer? 1-800-4-CANCER
  • Print
  • Facebook
  • Twitter
  • Google+
  • Pinterest

NCI Dictionary of Cancer Terms


proctosigmoidoscopy  listen  (PROK-toh-sig-moy-DOS-koh-pee)

  Examination of the lower colon using a sigmoidoscope, inserted into the rectum. A sigmoidoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a tool to remove tissue to be checked under a microscope for signs of disease. Also called sigmoidoscopy.

Enlarge
Sigmoidoscopy; shows sigmoidoscope inserted through the anus and rectum and into the sigmoid colon.  Inset shows patient on table having a sigmoidoscopy.