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Colon cancer screening: Weighing the options

Fecal occult blood test or fecal immunochemical test

Fecal occult blood test (FOBT) and fecal immunochemical test (FIT) are lab tests used to check stool samples for hidden (occult) blood. The tests usually are repeated annually.

The pros:

  • Stool sample collection can be done at home.
  • There's no need to empty the colon ahead of time.
  • There's no need for sedation.

The cons:

  • The tests fail to detect some polyps and cancers.
  • Certain foods and medications might need to be avoided for several days before the test.
  • If blood is detected, additional tests might be needed to determine the source.
  • The tests can suggest an abnormality when none is present (false-positive result).