ANCA Positive Vasculitis

Antineutrophilic cytoplasmic antibody (ANCA) associated vasculitides are a heterogeneous group of rare autoimmune conditions that causes an inflammation of blood vessels with various manifestations. It includes three main diseases, which are granulomatosis with polyangiitis (GPA; formerly known as Wegener granulomatosis), eosinophilic granulomatosis with polyangiitis (EGPA; previously known as Churg-Strauss syndrome), and microscopic polyangiitis (MPA). Other ANCA-associated diseases are drug-induced vasculitis and renal limited vasculitis.