Niks, I hope this helps. I've had presumed IBD since October 2009. I'm still not officially diagnosed, but my doctors take me pretty seriously and they feel that I do have some type of IBD, so they have treated me as such, and as a result I've been in remission for the past 2 years or so. I probably won't get an official diagnosis until I flare up again, as my doctors and I feel it's not worthwhile to do more testing while I'm in remission. Before I was in remission, I had just about every test out there - colonoscopy, upper endoscopy, pill cam, CT, various blood & stool tests, etc. The only major tests I didn't have were barium swallow/barium enema, and MR-enterography. All my tests came back normal, did not find a thing out of place and my bowels looked perfect. My doctors treat me as though I have IBD based on my symptoms, the fact that I respond well to pred & Entocort, and the fact that we've ruled out most everything else that this could potentially be (Addison's, Lupus, etc).