Many options: The gold standard is colonoscopy, which is performed under sedation. Other alternatives include barium enema, ct colonography ("virtual colonoscopy"), flexible sigmoidoscopy, and/or checking for blood in bowel movements (hemoccult test). I recommend colonoscopy for all my patients at age 50 (or earlier, if they have a family history).
Answered 12/9/2013
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Several: Occult blood in stool and colonoscopy most commonly.
Answered 9/28/2016
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