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About Cancer

Bowel cancer

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. 

Last reviewed: 27 Jun 2025

Next review due: 27 Jun 2028

Page Credits: 

This section has been written, reviewed and updated by Cancer Research UK’s Patient Information Web Team. Thanks to the expert medical professionals and people affected by cancer who have helped to review this information.

  • Mr Ben Griffiths (Consultant Colorectal Surgeon)

  • Dr Mike Braun (Consultant Medical Oncologist)

  • Lynne Higgins (Colorectal Clinical Nurse Specialist)

  • Anna Boyles for the stoma information (Lead Stoma Nurse)

  • Our lay reviewers

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