Fecal immunochemical test

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Fecal immunochemical test
Faecal Immunochemical Testing container

Fecal Immunochemical Test (FIT) is a test that looks for traces of blood in a stool sample.[1] It is typically requested when investigating symptoms such as change in bowel habit, anemia, unexplained weight loss, and abdominal pain, which may be a sign of bowel cancer.[2]

A 2022 UK guideline recommends the use of a FIT threshold of fHb ≥10 µg Hb/g to select people with symptoms for an urgent referral for colorectal cancer investigation.[3]


  1. "Bowel Cancer: Testing for blood in your poo using the FIT test". Cancer Research UK. 6 December 2021. Archived from the original on 1 November 2022. Retrieved 3 December 2022.
  2. "Fecal immunochemical test (FIT): MedlinePlus Medical Encyclopedia". medlineplus.gov. Archived from the original on 2022-11-07. Retrieved 2022-12-03.
  3. Monahan KJ, Davies MM, Abulafi M, et al, Faecal immunochemical testing (FIT) in patients with signs or symptoms of suspected colorectal cancer (CRC): a joint guideline from the Association of Coloproctology of Great Britain and Ireland (ACPGBI) and the British Society of Gastroenterology (BSG) Archived 2022-11-27 at the Wayback Machine, Gut 2022;71:1939-1962