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proctosigmoidoscopy

(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.
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Sigmoidoscopy; drawing shows a sigmoidoscope inserted through the anus and rectum and into the sigmoid colon. An inset shows a patient lying on a table having a sigmoidoscopy.Enlarge this image in new window
Sigmoidoscopy. A thin, lighted tube is inserted through the anus and rectum and into the lower part of the colon to look for abnormal areas.
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