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Granulomatous polyangiitis (née Wegener granulomatosis) of the lung.
(A) Hematoxylin and eosin of granulomatous polyangiitis of lung. Necrosis, granulomatous inflammation, and vasculitis are identified. (B) Elastin stain of granulomatous polyangiitis of lung. Elastica disruption of the arterial wall supports a diagnosis of vasculitis.
