Immunochemical Faecal Occult Blood Test for Bowel Cancer

The immunochemical faecal occult blood test is a stool test used to look for hidden blood in the stool. It is also commonly called FIT, which stands for faecal immunochemical test.

This article is for general information only. If you receive a test kit or abnormal result, follow the instructions from your doctor, screening program or healthcare provider.

What Is FIT?

FIT checks for hidden blood in stool. NCI explains that a small stool sample is placed in a collection tube or on special cards and returned to a doctor or laboratory for testing. :contentReference[oaicite:8]{index=8}

Hidden blood does not always mean cancer. It can have other causes, but it should be followed up if the result is abnormal.

Why FIT Is Used

FIT may be used as a bowel cancer screening test because it can be done at home and does not require a camera test first. It can help identify people who need further investigation.

Stool-based tests are convenient for many people, but they need to be repeated at recommended intervals and followed up properly if abnormal.

How the Test Is Done

You usually collect a small stool sample at home using the kit provided. The sample is then returned by mail or taken to a healthcare provider or laboratory, depending on local instructions.

Follow the kit instructions carefully. Do not use an expired kit or change the collection method unless told to do so.

What Does an Abnormal Result Mean?

An abnormal FIT result means blood was detected. It does not prove cancer, but it means further investigation is needed.

CDC explains that abnormal stool test results need colonoscopy to complete the screening process. :contentReference[oaicite:9]{index=9}

FIT and Symptoms

FIT can be useful for screening, but symptoms should still be checked by a doctor. If you have visible blood in stool, persistent bowel changes, unexplained weight loss, abdominal pain or ongoing tiredness, seek medical advice.

For more testing information, read our Tests to Find Cancer in the Bowel article.

Final Thoughts

The immunochemical faecal occult blood test can help detect hidden blood in stool and identify people who may need colonoscopy. Use the kit correctly and follow up abnormal results without delay.