Thanks for your help. I checked there plus a couple of othe places. With what I could find out plus a long conversation with my urologist and a rheumatologist we seem to have figured out the problem
I'm not sure if you are aware of this, but there is an excellent bladder cancer forum, hosted by the American Bladder Cancer Society. You might want to join that (if you haven't already) and post this question there. http://www.bladdercancersupport.org/