Bowel cancer means cancer that starts in the large bowel (colon) and the back passage (rectum). It is also known as colorectal cancer. Your treatment depends on where the cancer starts in your bowel.
The bowel is split into 2 parts - the small bowel and the large bowel. The large bowel includes the colon, the rectum and the bowel opening (anus).
This section is about colon and rectal cancer. We have separate sections about anal cancer and small bowel cancer.