Colorectal Cancer Screening Tests

For average-risk adults, the Fecal Immunochemical Test (FIT) is typically recommended annually. The Stool DNA test (FIT-DNA) is usually performed every one to three years, depending on your provider's guidance and current guidelines. It is crucial to adhere to these intervals because stool tests only detect markers present at the time of collection; they do not visualize the colon, so missing a window could allow a polyp to grow undetected. What dietary restrictions apply before a Guaiac Smear Test (gFOBT) compared to a FIT test?::Before a Guaiac Smear Test (gFOBT), you must avoid red meat, raw or undercooked vegetables, and certain fruits like cantaloupe and turnips for three days prior to the test, as these can cause false positives. In contrast, the Fecal Immunochemical Test (FIT) is more specific to human blood and generally does not require dietary restrictions, making it more convenient for many patients. Always confirm specific instructions with your lab, as protocols can vary slightly. What happens if a polyp is found during a colonoscopy, and how soon will I know the results?::If a polyp is found, the gastroenterologist will usually remove it immediately using a snare and send the tissue to a pathology lab for analysis. You will typically receive the biopsy results within one to two weeks. If the polyp is benign, your doctor will schedule your next screening based on the size and type of the polyp, which may be sooner than the standard ten-year interval. If cancer is found, a multidisciplinary team will discuss treatment options with you promptly. Can I eat or drink normally after a colonoscopy, or are there specific restrictions?::Most people can resume a normal diet immediately after a colonoscopy, although you may feel bloated or gassy due to the air used during the procedure. It is advisable to start with light, easily digestible foods and stay well-hydrated. If you experienced significant sedation, you should not drive or operate heavy machinery for 24 hours. Contact your provider immediately if you experience severe abdominal pain, fever, or heavy rectal bleeding after the procedure.