Hi Mal,
I had one just a few months after completing my radiation treatment. A biopsy sample was taken and it was clean. Doctor said "come back in ten years". Photos showed no signs of polyps or other nasty conditions. Procedure was pretty easy as I was pretty well out of it. Drinking the bowel cleanser the day before was the worst part. Briny stuff. Also plan on having someone drop you off and pick you up. The effects of the anesthesia linger a while after the procedure and you will not be in any shape to drive. At least I was not.
Goog luck.
Don