proctosigmoidoscopy

Definition / meaning of proctosigmoidoscopy

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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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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