Which of the following is explicitly listed as an alternative option to colonoscopy for colorectal cancer screening?

• A. Colonoscopy
• B. Flexible sigmoidoscopy
• C. Barium enema
• D. FIT

Answer: (D)

Screening methods for colorectal cancer include options that test the patient without needing a full diagnostic procedure, as well as direct visualization tests. The fecal immunochemical test is a noninvasive, stool-based screen that looks for hidden blood, which can indicate cancer or large polyps. It’s listed as an alternative to colonoscopy in screening guidelines because it provides a simple, at-home option that doesn’t require bowel prep or anesthesia. If the FIT result is positive, a follow-up colonoscopy is done to diagnose and treat any findings. This noninvasive approach contrasts with colonoscopy, which involves direct visualization and potential removal of polyps in one procedure. While other tests exist (like flexible sigmoidoscopy or barium enema), FIT is the explicitly recognized stand-alone alternative to colonoscopy in many guidelines, making it the best answer in this context.