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.
( PROK-toh-sig-moy-DOS-koh-pee )
Source: NCI Dictionary of Cancer Terms
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