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About Cancer

Anal cancer

Anal cancer is a rare cancer that starts in the anus. This is where the bowel opens to the outside of the body. The main treatments are chemotherapy with radiotherapy (chemoradiotherapy) and surgery.

Anal cancer is different to cancer that starts in the back passage (rectum) or the large bowel (colon). These are called bowel cancer.

Read more about bowel cancer

Last reviewed: 15 Aug 2025

Next review due: 15 Aug 2028

Reviewed by: 

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.

  • Joanna Thomson (Lower GI oncology Clinical Nurse Specialist)

  • Mr Peter Coyne (Consultant Colorectal Surgeon)

  • Anna Boyles (Lead Stoma Nurse)

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