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Colorectal cancer

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Precancerous conditions of the colon or rectum

Precancerous conditions of the colon or rectum are changes to cells that make them more likely to develop into cancer. These conditions are not yet cancer, but there is a higher chance these abnormal changes will become colorectal cancer.

The most common precancerous conditions of the colon or rectum are:

  • adenomas
  • hereditary colorectal syndromes

If you have a precancerous condition, you will likely have regular follow-up and screening tests to find cancer as early as possible if it develops. Some precancerous conditions can be treated with surgery to help reduce the risk that they will become cancer.

Stories

Researcher Dr John Bell Dr John Bell revealed how cancer-killing viruses attack tumour blood vessels.

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Access to services in your community

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The Canadian Cancer Society’s Community Services Locator helps cancer patients and their families find the services and programs they need in their community.

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