Granuloma in eosinophilic granulomatosis with polyangiitis (Churg-Strauss)

Low power photomicrograph shows the palisading granuloma of eosinophilic granulomatosis with polyangiitis (Churg-Strauss) characterized by an area of necrobiosis (arrow) permeated by disintegrating neutrophils and palisaded by a histiocytic infiltrate. There may or may not be an accompanying vasculitis.