Colorectal cancer is also known as colon cancer or rectal cancer because it begins in the large intestine (colon or rectum) which is the final part of the digestive tract. Colona and rectum are the hollow tube which measures 5 – 6 feet in length running from the small intestine to the anus. The end point of the colon is the rectum. ·At the base of the rectum are the sphincter muscles which helps in preventing the rectum from emptying out accidentally. For more details https://vshospitals.com/advanced-cancer-care/colorectal-cancer/ or call us @ 9962242000.