Non-Neoplastic Dermatopathology

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5.1 Erythema Nodosum vs Nodular Vasculitis

Figure 5.1.7 Nodular vasculitis. Mixed inflammatory infiltrate with a predominance of neutrophils within fat lobules and extending into septae.

Figure 5.1.8 Nodular vasculitis. Neutrophils and leukocytoclasis with smaller numbers of eosinophils, lymphocytes, and histiocytes. No granuloma formation.

Figure 5.1.9 Nodular vasculitis. Hallmark of nodular vasculitis is infiltration of the walls of variably sized arterial and venous vessels with destruction of the vessel wall. At the arrow, a small vein is infiltrated by neutrophils with mild fibrinoid necrosis of the wall. Copyright © Wolters Kluwer, Inc. Unauthorized reproduction of the content is prohibited. 2023

SUBCUTIS

5 DISORDERS OF THE