Fecal Immunochemical Test for Occult Blood (FIT) – High Sensitivity (DNA-based)

How the Test Works

The test analyzes stool samples for DNA fragments associated with human blood. Unlike traditional chemical tests, this method is highly sensitive and specific, reducing false positives while improving accuracy for early detection.

What to Expect Before the Test

No special preparation is needed. Simply collect a small sample of stool in a provided container. If you’re using a kit, follow the instructions carefully to ensure accurate results. Avoid using laxatives or certain medications that could interfere with the test.

Common Uses and Benefits

This test is primarily used as a screening tool for colorectal cancer or to detect gastrointestinal bleeding. It’s often recommended for adults at average risk of colorectal cancer, though your doctor may suggest it based on your medical history or symptoms.

What the Results Mean

A positive result indicates the presence of occult blood, which may warrant further evaluation (such as a colonoscopy) to investigate potential causes like polyps, ulcers, or cancer. A negative result means no detectable blood was found in this sample, but it doesn’t rule out bleeding entirely.