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Colorectal Cancer Test Recommendations

British Columbia Specific Information

You can lower your risk of getting colorectal cancer by getting early colon screening. For information on colorectal screening, including the fecal immunochemical test (FIT) and who should be tested under the new BC Colon Screening program, visit British Columbia Cancer Agency Colon Screening.

For additional information on colon screening, visit Ministry of Health Colorectal Screening for Cancer Prevention in Asymptomatic Patients which also includes the Colorectal Cancer: Guide for Patients. You may also be interested in the Appendix A: Factors Influencing Colorectal Cancer Risk.

Making healthy diet and lifestyle changes can also lower your risk of getting colorectal cancer. For more information call 8-1-1 to speak with a registered dietitian, Monday to Friday from 9:00 a.m. – 5:00 p.m. Pacific Time, or you can Email a HealthLinkBC Dietitian.

Topic Overview

Screening tests for colorectal (colon) cancer

Screening tests for colorectal cancer look for signs of cancer before you have symptoms. Screening tests for colorectal cancer include:

  • Stool tests that can be done at home. They include:
    • FIT (fecal immunochemical test). This test checks for signs of blood in small samples of stool. There are no special diets to follow. This test is done every year.
    • gFOBT (guaiac fecal occult blood test). It checks for signs of blood in small samples of stool. You will need to avoid certain foods and medicines before doing this test. This test is done every year.
  • A procedure that allows your doctor to look directly at your colon. This test is usually done in your doctor's office or a medical clinic. It is done less often than stool tests but require more preparation. Getting ready may include having a liquid diet for a day or two before your appointment and following instructions to clean out your colon. This procedure includes:
    • A flexible sigmoidoscopy. It lets your doctor look at the inside of the lower part of your colon. It is done every 10 years.

For people at an average risk for colorectal cancer

Your risk for colorectal cancer gets higher as you get older. Experts say that most adults should start regular screening at age 50 and stop at age 74. Talk with your doctor about your risk and when to start and stop screening.

For people at an increased risk for colorectal cancer

Colonoscopy is the recommended screening test for people at high risk. Your doctor may recommend earlier or more frequent testing if you:

  • Already have been diagnosed with colorectal cancer.
  • Have a first-degree relative (parent, brother, sister, or child) with an adenomatous polyp or colorectal cancer.
  • Have had adenomatous polyps removed from your colon.
  • Have inflammatory bowel disease, such as ulcerative colitis or Crohn's disease.
  • Have a rare inherited polyp syndrome, such as FAP or Lynch syndrome (HNPCC).


Other Works Consulted

  • Levin B, et al. (2008). Screening and surveillance for the early detection of colorectal cancer and adenomatous polyps, 2008: A joint guideline from the American Cancer Society, the U.S. Multi-Society Task Force on Colorectal Cancer, and the American College of Radiology. CA: A Cancer Journal for Clinicians, 58(3): 130–160.


Current as of:
April 29, 2020

Author: Healthwise Staff
Medical Review:
Adam Husney MD - Family Medicine
Brian D. O'Brien MD - Internal Medicine
Kathleen Romito MD - Family Medicine
E. Gregory Thompson MD - Internal Medicine
Arvydas D. Vanagunas MD - Gastroenterology