Fast Five Quiz: Colorectal Cancer Screening

Ali Alqahtani, MD; Leyla Ghazi, MD


January 27, 2023

Numerous CRC screening tests are available; some detect both adenomatous polyps and cancer, and others primarily detect cancer. Although sDNA testing has a high sensitivity for cancer, its sensitivity for detecting polyps increases with polyp size (42%-50% for polyps ≥ 1 cm, 63%-67% for polyps > 2 cm, and 70%-80% for polyps > 3 cm). Flexible sigmoidoscopy, double-contrast barium enema, and CT colonography are all tests that can detect both adenomatous polyps and cancer. In addition to sDNA testing, FOBT and FIT have a high sensitivity for detecting cancer.

Learn more about various CRC screening tests and their recommended intervals.


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