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.
Bowel cancer is also called colorectal cancer. It affects the large bowel, which is made up of the colon and rectum.
Symptoms of bowel (colorectal) cancer can include bleeding from the back passage, blood in your poo or a change in your normal bowel habit.
The risk factors for bowel (colorectal) cancer include your age, family history, lifestyle factors and other medical conditions.
You usually start by seeing your GP and they might refer you to a specialist and organise tests. Get information on what happens, and read about screening for bowel cancer.
The stage of a cancer tells you how far it has grown through the bowel wall and whether it has spread to nearby lymph nodes or other organs. It helps your doctor to know which treatment you need.
Treatment depends on whether you have colon or rectal cancer, as well as your cancer stage. You might have surgery, radiotherapy or chemotherapy or a combination of these.
Survival depends on many factors including the stage of your bowel cancer when you are diagnosed and how it has responded to treatment. The figures for bowel cancer survival can only be used as a general guide.
All treatments must be fully researched before they can be adopted as standard treatment for everyone. Find out about research into bowel (colorectal) cancer, as well as how to take part in clinical trials.
Living with bowel (colorectal) cancer may mean you have changes to your diet, sex life or body image. There is support to help you cope.
Metastatic bowel cancer is cancer that has spread from the back passage (rectum) and large intestines (colon) to other parts of the body, such as the liver. It is also called advanced cancer. Treatment includes chemotherapy, surgery, targeted cancer drugs and radiotherapy.
Last reviewed: 27 Jun 2025
Next review due: 27 Jun 2028
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
About Cancer generously supported by Dangoor Education since 2010. Learn more about Dangoor Education
What to ask your doctor about clinical trials.
Meet and chat to other cancer people affected by cancer.
Questions about cancer? Call freephone 0808 800 40 40 from 9 to 5 - Monday to Friday. Alternatively, you can email us.