Fecal Occult Blood
The Fecal Occult Blood test measures the presence of blood in the stool, which may not be visible to the naked eye. Clinicians typically order this test as part of routine screening for colorectal cancer or to investigate gastrointestinal bleeding. It is commonly used in individuals who may have symptoms such as unexplained abdominal pain, changes in bowel habits, or a family history of colorectal conditions. The Fecal Occult Blood test can help identify potential issues early, allowing for timely medical intervention.
Test Essentials
Specimen Required
Stool (24 hrs)
Test Category
Hematology
Turnaround Time
Results for the Fecal Occult Blood test are typically available within 24–48 hours after the sample has been collected.
Clinical Information
Clinical Significance
Abnormal results from the Fecal Occult Blood test, particularly a positive result, may indicate conditions such as colorectal cancer, polyps, or other gastrointestinal issues. However, a positive result does not definitively mean that cancer is present, as other factors may contribute. Only a healthcare provider can interpret the results accurately and recommend further testing or treatment options based on the complete clinical picture.
Reference Ranges
Reference ranges for the Fecal Occult Blood test can vary depending on the laboratory methods and the population being tested. In general, a negative result indicates no blood in the stool, while a positive result suggests further investigation may be necessary. It's important to discuss the results with your healthcare provider, who can interpret them based on your individual context.
Sample Preparation
Before your Fecal Occult Blood test, you may need to avoid certain foods and medications that could affect the results. Common recommendations include refraining from eating red meat, certain vegetables like broccoli or cauliflower, and taking any nonsteroidal anti-inflammatory drugs (NSAIDs) for a few days prior to the test. It is best to consult with your healthcare provider for specific instructions tailored to your situation. Generally, no fasting is required for this test.
Frequently Asked Questions
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