You return the test kit to the doctor or a lab, where the stool samples are checked for the presence of blood. At home, you use a stick or brush to obtain a small amount of stool. For this test, you receive a test kit from your health care provider. The guaiac-based fecal occult blood test (gFOBT) uses the chemical guaiac to detect blood in the stool.Talk to your doctor about which test is right for you. It is important to know that if your test result is positive or abnormal on some screening tests (stool tests, flexible sigmoidoscopy, and CT colonography), a colonoscopy test is needed to complete the screening process. The Task Force outlines the following colorectal cancer screening strategies. Several screening tests can be used to find polyps or colorectal cancer. People at an increased risk of getting colorectal cancer should talk to their doctor about when to begin screening, which test is right for them, and how often to get tested. If you are older than 75, ask your doctor if you should be screened. The decision to be screened after age 75 should be made on an individual basis. Preventive Services Task Force recommends external icon that adults age 45 to 75 be screened for colorectal cancer. A colonoscopy is one of several screening tests for colorectal cancer.
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