Hi Jenna!
Well I am like you, in that I have IBD and problems with inflamed joints. I haven't been able to walk for the whole summer (5 weeks) and only a steroid injection into my ankle has helped a little bit, but I still can't put weight on my foot.
I'm not sure what they mean when they say something has shown up, but it could be inflammation. This shows up as a dark shadow on MRI scan, and infers that the joints are being attacked by your immune system. I was given sulfasalazine but it gave me bad stomach cramps so I stopped taking it. Not a day goes by without one or more of my joints giving way and stopping me from walking. It sucks, doesn't it? If you have IBD the chances are (25%?) you will get some sort of joint pain, which is caused by inflammation, resulting in a kind of arthritis, which is not the normal type caused by old age/wear and tear.
I have found that a steroid injection into my facet joints (6, under x-ray) has really really helped. My Doc also suggested a steroid injection into the bum (muscle) so that it releases the steroid slowly into your whole system. It's not ideal, but it really does help with out of control inflammation. x