ANCA-Associated Vasculitis There are many definitions, but most come down to the presence of granulomas (pathologically or clinically) and asthma/eosinophils No granulomatous inflammation: • Microscopic Polyangiitis Granulomatous Inflammation: • No Asthma and Eosinophilia - Granulomatosis with polyangiitis (GPA) • Both asthma and eosinophilia (>1500 and/or 10%) - Eosinophilic granulomatosis with polyangiitis (eGPA) Stanford Internal Medicine Chiefs @StanfordChiefs #ANCA #Vasculitis #differential #diagnosis #algorithm #rheumatology