what does it mean when your fecal occult test is positive?
1 Stool tests can produce false-positive and false-negative results. 2  False-positive means that the test may be positive when you don't have a polyp or cancer. 3  False-negative means that the test may be negative when you do have a polyp or cancer.4  These tests may miss polyps and some cancers.n abnormal FIT/iFOBT or FOBT test means that there was some blood in your stool at the time of the test. An abnormal sDNA test means that some abnormal cells were found. Abnormal test results are called positive.