Canadian Cancer Society logo

Colorectal cancer

You are here: 

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

Dr Jason Gilliland Dr Jason Gilliland is promoting physical activity in kids.

Learn more

Volunteers provide comfort and kindness

Illustration of volunteers

Thousands of Canadian Cancer Society volunteers work in regional cancer centres, lodges and community hospitals to support people receiving treatment.

Learn more