Quick Facts
- Sample: Stool
- Fasting: No special preparation is required
- Turnaround: 3-4 days (may take longer based on weather, holiday, or lab delays)
What This Test Measures
The Occult Blood, Fecal, Immunoassay Test (FIT) detects hidden (occult) blood in a stool sample using an immunoassay method that identifies fecal globin, a protein component of blood. This blood is not visible to the naked eye, so the test relies on laboratory analysis of the specimen to identify its presence.
Detecting occult blood in stool is a finding, not a diagnosis. Blood in the stool can result from a variety of causes, including colorectal polyps, colorectal cancer, gastrointestinal bleeding, or inflammatory bowel disease. This test identifies whether blood is present in the sample; it does not determine the source, location, or cause of that blood on its own.
Benefits
- Detects hidden blood in stool not visible to the eye
- Supports colorectal cancer screening as part of routine care
- Non-invasive way to check for occult gastrointestinal blood
- Can be used alongside evaluation for anemia or GI symptoms
- Uses immunoassay methodology to identify fecal globin
Who Is This Test For?
- Individuals with a family history of colorectal cancer
- Individuals who have previously had colorectal polyps
- Individuals with a personal or family history of ovarian cancer
- Individuals with inflammatory bowel disease, such as ulcerative colitis or Crohn's disease
- Individuals interested in routine colorectal cancer screening
How It Works
- Order Your Test Online
- Visit a Local Lab
- Get Results Online
FAQ
1. Do I need to fast before this test?
No special preparation is required for this test. You do not need to fast before providing your stool sample.
2. How quickly will I get results?
Results are typically available in 3-4 days. Turnaround time may take longer based on weather, holidays, or other lab delays.
3. How do I collect the sample for this test?
You must take your lab order to the laboratory to obtain a proper specimen collection container before collecting your stool sample. Follow the instructions provided with your collection container.
4. What does an abnormal or positive result mean?
A positive result means that occult blood was detected in your stool sample. This test identifies whether blood is present; it does not identify where the blood is coming from or what is causing it. Possible causes of occult blood in stool include colorectal polyps, colorectal cancer, gastrointestinal bleeding, or inflammatory bowel disease, among other conditions.
5. How do I interpret my results?
Interpretation depends on the presence or absence of occult blood together with your symptoms, personal and family medical history, screening history, and any other test results. A single result should not be viewed in isolation, and your healthcare provider can help place it within your overall health picture.
Disclaimer: Reference ranges may vary by laboratory. Listed ranges are general guidelines and may differ from those used by the performing lab. Always consult your healthcare provider for interpretation.
6. What should I do if my results are abnormal?
Review an abnormal result with a qualified healthcare provider. They can help determine whether additional evaluation or testing may be appropriate based on your individual health history and this result. Do not attempt to interpret or act on an abnormal result without professional guidance.
Pre test preparation
Patients must take their lab order to the lab to obtain a proper specimen container before collection. No special preparation is required.
