Systemic vasculitis with coexistent large and small vessel involvement. A classification dilemma.

A patient with systemic vasculitis had the palpable purpuric lower extremity lesions of leukocytoclastic vasculitis and the renal aneurysms of polyarteritis nodosa, features thought to clearly separate these two syndromes. Questions are raised pertinent to the classification, diagnosis, treatment, and prognosis of systemic vasculitis.