JIM DOWDALLS / SCIENCE PHOTO LIBRARY JIM DOWDALLS / SCIENCE PHOTO LIBRARY
Illustration of a Polyp inside the colon during a colonoscopy. Polyps are tissue growth inside the colon, and are routinely found during a colonoscopy. Some polyps are benign, but some can be cancerous, or lead to cancer. These polyps can be removed during the colonoscopy.
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