Radiation therapy uses X-rays to destroy colorectal cancer cells and shrink tumors. It is often used to treat rectal cancer, usually combined with surgery. It is used less often to treat colon cancer. It may also be combined with chemotherapy.
Call your doctor if you have any symptoms of colorectal cancer, such as a change in bowel habits, bleeding from your rectum, including bright red or dark blood in your stools, or constant or frequent diarrhea or constipation.
Is this topic for you? This topic provides information about the initial testing, diagnosis, and treatment of colorectal cancer. If you are looking for information on colorectal cancer that has come back or has spread to other parts of the body, see the t