Most people with colon or rectal cancer can be treated successfully and in effect cured. Colorectal cancer, also known as colon cancer, includes tumors that are located in the colon or rectum. The colon and rectum are the last parts of the intestinal tract, which begins with the mouth and ends with the anus. The first 6 feet of the large intestine is call the large bowel or colon. The last 6 inches are the rectum and the anal canal. The anal canal ends at the anus - the opening to the outside of the body. Most cancers involving the intestinal tract occur in the colon or rectum. These are the third most common cancers found in both men and women. Genetic predisposition is a significant part of colon cancer; about 15% of people with colon or rectal cancers have a clear family history. If physicians look for cancers and precursors of cancers - polyps - the incidence of colon cancer can be reduced in those high risk patients.