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Figure 3: Punch biopsy from an ulcer on the abdomen. High power view of dermis showing medium-sized vessel vasculitis characterized by fibrin thrombus and leukocytoclasis surrounding the blood vessel and infiltrating the vessel wall (H and E, ×20)

Figure 3: Punch biopsy from an ulcer on the abdomen. High power view of dermis showing medium-sized vessel vasculitis characterized by fibrin thrombus and leukocytoclasis surrounding the blood vessel and infiltrating the vessel wall (H and E, ×20)