Figure 22

Predominant distributions of renal vascular involvement. This diagram depicts the predominant distributions of renal vascular involvement by large, medium-sized, and small vessel vasculitides [2]. Note that all three categories may affect arteries, although arteries are least often affected by the small vessel vasculitides and often are not involved at all by this category of vasculitis. By the Chapel Hill definitions, glomerular involvement (ie, glomerulonephritis) is confined to the small vessel vasculitides, which provides a concrete criterion for separating the diseases in this category from those in the other two categories [3].

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