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. Author manuscript; available in PMC: 2011 Dec 1.
Published in final edited form as: Surg Clin North Am. 2010 Dec;90(6):1161–1180. doi: 10.1016/j.suc.2010.08.006

Figure 4. Diagrammatic representation of the difference in small versus medium-sized (deeper) vessel vasculitis and the impact on skin findings.

Figure 4

A superficial vasculitis (left side of diagram) leads to a wedge-shaped area of necrosis and, thus, a well defined and regular skin purpura or necrosis. Conversely, occlusion of a deep vessel (right side of diagram) leaves open the chance for anastomosing vessels to alter the effect at the skin.