Polyarteritis nodosa (PAN) is a necrotizing vasculitis, predominantly involving medium-sized arteries, that causes systemic disease, and, less commonly, cutaneous-limited disease. The population prevalence for PAN ranges from 2 to 33 per million.1-3 Estimates vary due to the increased recognition and classification of other forms of vasculitides over time and variation in the regional prevalence of…
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