Dr. Ernest Hawk of the National Cancer Institute's Cancer Prevention Division describes the tests that are used to detect colon cancer beginning at age 50.
The following clip is a 'virtual' tour of the colon. The left side of the screen is an exterior representation of the colon and the right side of the screen is a tour of the inside of the colon.
This movie requires the QuickTime plug-in. If you do not have the plugin, please click here to install.