Fortunately, colorectal cancer develops slowly, typically over a period of 10 to 20 years. In many cases, screening tests can detect and prevent it before it develops into cancer. A screening test is a test performed as a preventive measure to detect a disease in someone before they begin to develop any signs or symptoms.

Average age for colon cancer screening

Adults at average risk of developing colorectal cancer should begin screening at age 45.

Individuals with a family history of colorectal cancer must start screening earlier.

UCLA Health strongly recommends that adults at average risk of developing colorectal cancer begin screening at age 45. Screening starting at age 45 is also supported by several professional medical societies, including the United States Preventative Service Task Force (USPSTF).

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