Relapses in patients with anti-neutrophil cytoplasmic antibody-associated vasculitis: a retrospective study.

Global activity of RE in AAV patients is lower than that of IO. Fewer organs are involved in relapses. RE turned out to begin with the same manifestations as IO in most cases.Key Points•First study looking into clinical characteristics of relapses including mostly granulomatosis with polyangiitis.•Around half of patients with AAV seemed to relapse in a similar way compared to the initial diagnosis.•The activity score during relapsing events is less important.