What is the recommended screening test for colorectal cancer?

The recommended screening test for colorectal cancer is a colonoscopy starting at age 45. This recommendation is based on guidelines that aim to identify colorectal cancer and precancerous polyps early when they are most treatable. Colonoscopy allows for direct visualization of the colon and rectum, and if abnormalities are found, they can be biopsied or removed during the procedure.

Starting screenings at age 45 is crucial because recent studies indicate that the incidence of colorectal cancer is rising among younger adults. Therefore, initiating screenings earlier than previously recommended, which was age 50, helps to ensure earlier detection and intervention.

While other tests such as the fecal occult blood test, flexible sigmoidoscopy, and CT colonography are also valuable tools for colorectal cancer screening, colonoscopy provides the most comprehensive examination of the colon and the opportunity to remove polyps during the procedure, which is a significant preventive measure against the development of cancer. Therefore, for individuals at average risk, a colonoscopy is the gold standard screening method starting at age 45.