Colonoscopy is one of the colorectal cancer screening tests available to people in the US who are over 50 years of age.
Although widely touted in the US as the “gold standard” of colon cancer screening, colonoscopy has never been studied as a screening tool. Most of what we believe to be true about the benefits of colonoscopy have been extrapolated from randomized trials of the sigmoidoscopy.
The procedure is used as a tool for routine colon cancer screening and prevention in people beginning at age 45. Small growths called polyps can be removed during the colonoscopy before they have the chance to grow into a colorectal cancer.

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