Which colorectal cancer screening test is performed annually for average-risk adults?

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Regular colorectal cancer screening in average-risk adults can be done with several options, but the one that's performed every year is a stool-based test such as the fecal immunochemical test (FIT) or the fecal occult blood test (FOBT). This approach checks for hidden blood in the stool, which can be an early sign of cancer or polyps. Its annual repetition makes it a convenient way to monitor risk over time, and if the test is positive, a follow-up colonoscopy is performed to diagnose and remove polyps or investigate cancer. Other screening methods, like colonoscopy, CT colonography, or flexible sigmoidoscopy, are done at longer intervals (about every 5 years for CT colonography or flexible sigmoidoscopy, and roughly every 10 years for colonoscopy) because they provide more comprehensive visualization or diagnostic capability.