Fecal Occult Blood Test (FOBT)
This test is used to screen for early colon cancer. Because blood in the stool may be the only symptom of early cancer a sample of stool is tested for traces of blood. People having this test will receive a kit with instructions that explains how to take stool samples at home. The stool sample is then sent to a lab for testing. If the test is positive, further tests will be done to determine the exact cause of the bleeding. Positive results will require other follow-up tests and procedures to find the source of the bleeding.
A newer kind of stool blood test is known as FIT (fecal immunochemical test). It is like the FOBT, perhaps even easier to do, and it gives fewer false positive results.