My doctor always checks when the last colonoscopy was. Mine was a few months after 5 years and I had no polyps last time.
My flat polyp is near the appendix and all the info I could find says very few are found during a colonoscopy most are noted at an autopsy. So that being said maybe my polyp would not have been found without doing the colorguard first. Perhaps the doctor doing my colonoscopy was looking more closely since the positive colorguard.
Wont ever know just glad that it was found.