Anti-neutrophilic cytoplasmic antibody (ANCA) associated vasculitides (AAV) is a rare autoimmune condition that can present in a multitude of ways.1 It causes infammation of small blood vessels and can result in multi-organ involvement.2,3 AAV is an umbrella term and includes granulomatosis with polyangiitis (GPA), eosinophilic granulomatosis with polyangiitis (eGPA) and microscopic polyangiitis (MPA).2
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