Although the exact cause of colorectal cancer is undetermined, it results when cells that have become mutated in the inner wall of the rectum or colon propagate of control, producing a tumor or growth. There are certain circumstances, however, that may elevate the chance of developing colon or rectal cancer. These factors involve lifestyle habits, like tobacco and alcohol use, inadequate amounts of physical activity, and poor nutritional habits, in addition to having a genetic or hereditary predisposition.