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“In PLEVA, the more severe form, one observes vascular changes consisting of a pronounced mononuclear infiltrate around capillaries, with the capillaries showing endothelial swelling and permeation of their walls by the infiltrate. This usually results in only mild, focal extravasations of erythrocytes representing a lymphocytic vasculitis.”Lever WF. Vascular diseases. Chap 9 in: Histopathology of the […]