Colorectal cancer usually starts as a polyp, which is clearly seen in endoscopy. Building of fluid around the rectum is not a sign of a cancer, but a rather a sign of inflammation.
Thank you for your input. I had a colonoscopy 2 years ago which only showed diverticulosis...mild at that...and basically was normal. My doctor is an internal medicine doctor. The radiologist who did this last procedure to try to drain the fluid said that the reason he couldn't draw any fluid out was the fluid kept moving. My mom had diverticulitis and ulcerative colitis that was severe because she let it go for so long before doing anything about it. Her father died of colon cancer. I appreciate your support and have a few more ideas to throw into the stew pot.
The fluid could be from a fistula in the large colon......this is fairly common in Ulcerative Colitis and Crohn's disease. A colonoscopy should be the next step to view the colon and take biopsies. I don't think a sigmoidoscopy will go far enough up the colon. Hopefully when you see your doctor 7.2 (he is a gastro, isn't he, not just a general physician?) he will be able to order further invasive testing for a definitive diagnosis.
Take care.
Liz.
If contrast was found outside the gut, then rectum should be examined carefully to find the leak, since perforated intestine may lead to peritonitis. Hard to be smart here, I guess your doctors know what they are doing. My guess is that you need colonoscopy (or sigmoidoscopy) to see exactly what is happening.