I see from C2's second post that this refers to the recent discussion concerning flat polyps, which can go malignant without the more easily recognized protrusions that alert
the colonoscopy operator to remove or biopsy them. Of course this is doubly true for other modes of screening (virtual colonoscopy, CT scans, barium, etc.) Flat things are easier to miss that things that jump out at you. This really has not much to do with the scopes we have for IBD. I remembr when I was first tested for persistent D and bowel trouble at 19 . . . pre-colonoscopy. Had the traditional upper and lower GI series with barium, and of course it showed nothing. Left with a diagnosis of "you just have nervous bowels," which I lived with for another 14 years, until a massive GI bleed put me in the hospital and the scope the next day confirmed Crohns. So whatever drawbacks any medical technology may have, I'll opt for the most modern and useful one anyway. The simplty fact is that those scopes make diagnosis much easier and more likely,a nd save a lot of lives. Nothing is perfect.