Non-Neoplastic Dermatopathology

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5 Disorders of the Subcutis

Figure 5.12.5 Polyarteritis nodosa. Inflammation of medium-sized arteriole with necrosis of the vessel wall (arrow). Note that the fat lobules have minimal inflammation and necrosis. Small vessels and veins are not involved.

Figure 5.12.6 Polyarteritis nodosa. Infiltration of the wall of medium-sized arteriole by neutrophils and lymphomononuclear cells with destruction of the wall and erythrocyte extravasation.

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