Should patients who received pelvic radiation get colonoscopy screenings more often than what is recommended for the general population?

The excess risk of secondary cancer after radiation has been estimated at 0.5% in a 15 year follow-up period. This relatively low incidence would not justify a higher interval of screening colonoscopy after pelvic radiation. As a component of our patient-reported quality of life survey, we do screen every prostate cancer patient in follow-up whether they are current with colonoscopies per usual guidelines (every 10 years if no polyps, every 3-5 years if personal history of polyps or high risk), ...