Fecal Occult Blood Tests and IFOB Tests. Fecal occult blood test (FOBT) or the fecal immunochemical test (FIT) is used as a screen for early colon cancer. Most cases of colon cancer begin with the development of benign intestinal polyps. Benign polyps are relatively common in people over the age of 50. Most are harmless, but some can become cancerous. Blood in the stool may be the only symptom of early cancer; thus, if detected early, treatment can begin immediately, improving the chance of a cure. We carry popular, leading brands including Pro Advantage, Hemoccult, Seracult, and QuickVue iFOB tests.