Colonoscopy is the tool of choice for physicians who need to detect the colon cancer, which is a leading cause of cancer deaths in the U.S.

THeVisualMD created an educational video that explains what doctors do see trough the camera on the thin tube, and how they detect polyps – the abnormal growths.

Read about colonoscopy and watch the video here – http://www.scientificamerican.com/article.cfm?id=inside-look-colonoscopy-video.