Step 4: Read and complete the decision guide to learn more about your symptoms.
Colon Cancer Screening
Colonoscopy is the most accurate test for detecting colon cancer and precancerous colon polyps. Studies suggest colonoscopy finds more than 90 percent of cancers and important polyps. Your doctor can also remove worrisome polyps at the same time that you are screened for cancer.
Slightly less accurate alternatives to colonoscopy include
computed tomography, also called "virtual" colonoscopy
flexible sigmoidoscopy combined with barium enema or stool cards (fecal occult blood tests).
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