Posted 7/19/2017 1:15 PM (GMT -6)
I have not had the procedures you mentioned, but would imagine that there could be benefits from getting the full colonoscopy, for a new baseline, if nothing else. It might also help to diagnose if you might already have any existing proctitis or lingering effects/damage from your earlier treatments involving radiation. They could get pictures of it, and perhaps spot treat some of it while they are in there.
Have you had a previous colonoscopy, and, if so, did it reveal that your body produces colon polyps, which may have been previously removed? If you have a history of producing polyps, the likelihood of producing more polyps becomes significantly greater. The colonoscopy screening/testing interval for people whose bodies produce pre-cancerous polyps needs to become more frequent than for the general, low risk public.
On a related matter, in April 2016, the U.S. Preventive Services Task Force began recommending that people who are 50 to 69 years old, have an increased risk of cardiovascular disease, and are not at increased risk for bleeding consider taking aspirin to prevent cardiovascular disease and colorectal cancer. The risk for colorectal cancer might be reduced by around 20%. Talk with your doctor.
Just some thoughts,