What is single organ vasculitis?

• The involved organ and vessel type should be included in the name (eg, primary central nervous system vasculitis [CNSV], cutaneous leukocytoclastic vasculitis, isolated aortitis) • Some patients initially diagnosed with single-organ vasculitis may develop other disease manifestations, warranting reevaluation for another systemic vasculitis (eg, cutaneous arteritis later becoming polyarteritis nodosa).