NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,098 terms related to cancer and medicine.

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proctoscope
(PROK-toh-skope)
A thin, tube-like instrument used to look inside the anus and rectum. A proctoscope has 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.