Colorectal Cancer Screening Tests 1 Stool Tests. … 2 Flexible Sigmoidoscopy. … 3 Colonoscopy. … 4 CT Colonography (Virtual Colonoscopy) Computed tomography (CT) colonography, also called a virtual colonoscopy, uses X-rays and computers to produce images of the entire colon, which are displayed on a computer …
Several screening tests can be used to find polyps or colorectal cancer. The Task Force outlines the following colorectal cancer screening strategies. Talk to your doctor about which test is right for you. The guaiac-based fecal occult blood test (gFOBT) uses the chemical guaiac to detect blood in the stool.
Most colorectal cancers begin as a growth, or lesion, in the tissue that lines the inner surface of the colon or rectum. Lesions may appear as raised polyps, or, less commonly, they may appear flat or slightly indented.