It may be more helpful focus on what you don't have. Rheumys usually order labs to test for specific autoimmune diseases. If results are negative, they use this as an exclusionary process along with your symptoms to conclude that you have PMR. Conventional treatment for automimmune diseases in general includes prednosone. You have to weigh the costs vs the benefit of taking steroids, which are known to have serious side effects. That's a personal choice. It's important to do your homework.