Colonoscopy

What To Think About

  • In general, pregnant women or people who have severe heart disease, an abdominal infection, or diverticulitis should not have a colonoscopy unless there is an important reason for it.
  • Colonoscopy is a more expensive procedure than a barium enema and other endoscopic colon tests (such as proctoscopy or sigmoidoscopy), but it can be done less often over time if results are normal. Colonoscopy is recommended every:
    • 10 years for people with normal results.
    • 3 to 5 years for people with increased risk factors for colorectal cancer or when problems are found during the colonoscopy.
  • Most experts, including the American Gastroenterological Association, recommend that people with no risk factors for colorectal cancer start screening tests at age 50.
  • The American Gastroenterological Association recommends that people with a family history of colorectal cancer start screening tests at age 40, or 10 years before the age that the relative got cancer.
  • If you are at increased risk for colon cancer, talk to your doctor about which test is best for you and how often you should have the test.
  • A virtual colonoscopy uses a CT scan to take two- or three-dimensional pictures of the colon.
    • Virtual colonoscopy may be a good test for people with an average risk of colon cancer. But if you have a virtual colonoscopy and a problem is found, you may need to have a standard colonoscopy so that a biopsy can be done.
    • For people with a risk for colon cancer, standard colonoscopy may be a better choice because a biopsy can be done or a polyp can be taken out.
    • Virtual colonoscopy is not covered by all health insurance plans. Check with your insurance plan before having the test.
    • Virtual colonoscopy uses the same colon prep as colonoscopy. For many people, the prep for a colonoscopy is more bothersome than the actual test.

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Author: Monica RhodesLast Updated: September 1, 2006
Medical Review: Kathleen Romito, MD - Family Medicine
Peter J. Kahrilas, MD - Gastroenterology

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Topic Contents
 Test Overview
 Health Tools Click here to view Health Tools.
 Why It Is Done
 How To Prepare
 How It Is Done
 How It Feels
 Risks
 Results
 What Affects the Test
Arrow PointerWhat To Think About
 References
 Credits