I under went a colonoscopy on Thursday and they found inflammation and diverticulitis in the sigmoid colon. He also found something at the other end of my colon and is awaiting biopsy results. What I don't understand is my symptoms don't match diverticulitis and have been on going for over a decade. In 2001 I started having bloody bowel movements with extreme abdominal pain, I also lost forty pounds in six months. Colonoscopy then found a Lesion or fold (depending on when you asked the doctor), but biopsy's came back fine. I started pushing for answers again and they didn't find anything at all during that colonoscopy. A few months ago I started passing just Blood and quite a bit if it. I feared something major, so I started pushing again. What I don't understand is how something like this was missed before, or if there is something that could be miss diagnosed as diverticulitis. And the lack of symptoms of diverticulitis is really bothering. Basically I have diarrhea not constipation. My pain is just under my ribs, not lower left. And why didn't they see anything at all in December 2009?