I'm 25/f who has been experiencing problem with swelling in my knee \ going on six years now, I also experience popping and locking. Most of my doctors thought this period have assumed due to my history of arthritis that this is arthritis related too, even though when I originally saw the doctor about it I described it as a twist injury (we'd been moving equipment and boxes around the lab that day), this first doctor did x-rays amd referred me to an orthopedic surgeon who drained it and hardly gave me the time of day, shortly after my doctor moved and my new doctor, assuming arthritis sent my to a rheumatologist who ran some test that didn't really give us answers. He did an ultra sound on the knee and an MRI, he also drained it and injected cortisone which help for a while. My current GP (my fourth since this began this time due to me moving) has tried me on many arthritis drugs for the swelling, some have reduced it but not one of them has brought my knee even close to the size on the other one.
My could the MRI have missed joint/cartilage damage? I don't remember if they used dye. I really don't think this is arthritis, it's not painful like it was in other joint and I have only once during the last six years had a flare up in any other joint and the root cause of the arthritis seems to be thyroid deficiency, my only flare up being when my thyroid meds had to be stopped for six weeks for them to run more thyroid tests.