Vasculitis related to antineutrophil cytoplasmic antibodies (ANCA) (ANCA-vasculitis) is an autoimmune disease that causes inflammation of small to medium-sized blood vessels with consequent damage and loss of function in certain organs.
The ANCA-associated vasculitides are defined by specific pathological changes and associated autoimmune responses produced by ANCA antibodies. The nomenclature of vasculitis from the consensus conference in Chapel Hill defines ANCA-vasculitis as necrotizing vasculitis with little or no immune deposits and predominant involvement of small blood vessels (capillaries, venules, arterioles, and small arteries). There are two phases in the treatment of ANCA small vessel vasculitis—induction treatment and maintenance therapy.
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