Microscopic Polyangiitis
Synonyms
Microscopic Polyangiitides
Polyangiitides, Microscopic
Polyangiitis, Microscopic
A primary systemic vasculitis of small- and some medium-sized vessels. It is characterized by a tropism for kidneys and lungs, positive association with anti-neutrophil cytoplasmic antibodies (ANCA), and a paucity of immunoglobulin deposits in vessel walls.