For men and women at average risk, screening should begin at age 50. Recommended screening options include:
• colonoscopy every 10 years
• flexible sigmoidoscopy every 5 years
• double-contrast barium enema (lower GI series) every 5 years
• CT colonography every 5 years
• fecal occult blood test or fecal immunochemistry test every year
• DNA stool testing
Men and women with certain risk factors - such as a personal or family history of colorectal polyps or cancer - need to talk with their doctor about getting screened at a younger age. If any of the screening options show polyps or a positive result (abnormal), a follow-up colonoscopy is recommended.