yup, it's the chronic inflammation that does it. My last visit with my GI we were discussing just this, & he was expressing concern because I'm going into year 7 with pretty much barely controlled UC. His take on the cancer risk is this- someone who has constant low-grade inflammation (like most of us!) are much more at risk of developing cancer than someone who has 1-2 big flares a year, then goes into a real remission. I shouldn't say it's "his take", that's pretty much the facts. So many of us here have daily symptoms, indicating chronic low-grade inflammation, despite the big gun meds we take. So, it is indeed a real risk. And colonoscopies do not always catch cancer- those "flat polyps" are hard to see, & if you have a lot of pseudo-polyps it's very easy to miss cancer. I have literally hundreds- it's basically impossible to biopsy every single one, so it'd be pretty easy to miss that one (or 5) cancerous one. I have decided it's my risk to take, I'm willing to chance it- for now. I would never hold my GI accountable if I were to develop colon cancer, regardless of colonoscopies. He's been pushing for surgery for a couple years now. I think you have to make that individual decision- is your colon worth possible dying for? Do you have many polyps or pseudopolyps? Have you exhausted the med regime & are still symptomatic? I don't plan to take this risk forever, but I'd like to hold out a few more years, maybe 'til I'm 40, prior to having surgery. Unless of course things detiorate rapidly.