I am using Hizentra for multiple myeloma and the resulting hypogammaglobulinemia. I am being tested for RA. I'm concerned that since RA is an autoimmune issue that the Hizentra will just make it worse. Hizentra, along with Zometa, have kept my cancer in remission for 9 years. Obviously, I would not want to stop the Hizentra, since it is working so well for me. Any thoughts?