[Update on treatment of ANCA-associated vasculitis: Granulomatosis with polyangiitis and Microscopic Polyangiitis].

In the past 2 years several important studies on the treatment of granulomatosis with polyangiitis (PGA) and microscopic polyangiitis (MPA) have been published, which led to a change in the therapeutic procedure of these diseases. Rituximab is now established as the standard treatment for remission induction and maintenance in cases of organ-threatening disease. Adjunctive glucocorticoid treatment can be tapered according to a new reduced dose scheme and avacopan, a C5a receptor inhibitor, offers even more potential in the future for additional economization of glucocorticoids. Uncertainties remain regarding the duration of treatment for maintaining remission. New studies suggest that treatment for maintaining remission for longer than 24 months is meaningful.