Which of the following is NOT one of the listed colon cancer screening options?

• A. Double-contrast barium enema every 5 years
• B. FOBT annually with colonoscopy follow-up if abnormal results
• C. Colonoscopy every 10 years
• D. Flexible sigmoidoscopy every 5 years plus FOBT every 3 years

Answer: (A)

Screening tests for colorectal cancer vary in sensitivity and practicality, and some older methods are no longer considered standard options. The double-contrast barium enema is an older imaging test that has lower sensitivity for detecting polyps and cancers and cannot remove polyps; it often necessitates a follow-up colonoscopy anyway. Because of this, it is not listed among the modern recommended screening strategies. The other options—colonoscopy every 10 years; annual fecal occult blood testing with colonoscopy if positive; and flexible sigmoidoscopy every 5 years with fecal testing every 3 years—are all recognized screening approaches.