Hi! My husband found your post and told me about it. I was diagnosed with PAN in 1999. The course of action my Dr. took was heavy doses of Cyclophosphomide. They quickly treated me with some medicines that were not 100% "safe" but, worked well for me. I was also on Prednisone (steroids) for about 2 years to keep inflammation down. If you would like to talk to my Dr. he is wonderful and might have information for your Dr. His name is Dr. Chris Jackson.
He is in the office of Rheumatology. What I have seen is that it is imperative for Doctors to figure out exactly what you have. Polyarteritus Nodosa is a mimicker and many other diseases could actually be the problem. For me, everything started with a stroke in my dorm room. If you would like more information, PLEASE write me!
I would love to talk to you about it more and help in any way I can. I am in complete remission and want to help you. Please contact me.