Primary CNS vasculitis is hard to diagnose up front & bx data limited, but maybe reactive astrocytes (being CNS cells) might help differentiate versus mimics? We’ll take all the markers we can get @ClevelandClinic @ChanmiLee @LCalabreseDO @RulaHajjAliMD #ACR19 ABST1717 @RheumNow https://t.co/gF7ayDO6vQ