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Colorectal Cancer Screening Fecal Immunochemical Test (FIT) – Quantitative

Published: August 9, 2026Updated: August 16, 2026

This test measures hidden blood in your stool to help detect early signs of colorectal cancer or precancerous polyps. It’s a simple, painless screening tool.

Quick summary

["A positive result may prompt further testing to investigate potential causes, including colorectal cancer."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
44120-4
Short code
Deprecated Colon CT
Synonyms
Deprecated Colon CT
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test detects human hemoglobin, a protein found in blood, in your stool. While most causes of hidden blood are harmless (like hemorrhoids or minor digestive issues), this screening helps identify blood from deeper sources like colorectal cancer.

How It’s Performed

You’ll collect a small sample of your stool using a provided kit. The sample is then sent to a lab for analysis. The test is usually done at home or during a routine office visit.

Why It’s Done

Colorectal cancer screening is recommended for adults starting at age 45 (or earlier, depending on risk factors). A positive FIT result does not mean you have cancer, but it signals the need for additional evaluation, such as a colonoscopy.

What to Expect After the Test

After sending your stool sample, you’ll receive results typically within 3–5 business days. If your test is positive, your healthcare provider will discuss next steps, which may include further testing like a colonoscopy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

FIT (Quantitative)

Frequently asked questions

What does a positive result mean?
A positive FIT result indicates the presence of hidden blood in your stool, which could be due to colorectal cancer or other conditions. Follow-up testing is essential to determine the cause and next steps.
How often should I get this test?
The frequency depends on your risk factors. For average-risk adults, screening is usually recommended every 1–2 years. High-risk individuals (e.g., family history, personal history of colorectal cancer) may need more frequent testing.
Can I eat or drink anything before the test?
Yes, you can eat and drink normally before the test. Avoid using laxatives or enemas, as they can interfere with the results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy