Essay --

Objective We aimed to study the demographic Characteristics of the primary vasculitides in Northeast of Iran.Methods We retrospectively analyze the medical records of patients diagnosed with any kind of vasculitis at the Clinic and Department of Rheumatology of the Imam Reza Hospital, Mashhad, Iran between January 1, 2002, and December 31, 2012. Patients were classified according to the American College of Rheumatology 1990 criteria for the classification of vasculitis and the 2012 Revised International chapel Hill Consensus Conference Nomenclature of Vasculitides. Results A total of 721 patients (51.5% male, 48.5% female) with a diagnosis of primary vasculitis were identified. The frequency distributions of vasculitic disorders were as follows Behcets disease, 63.6% cutaneous leukocytoclastic angiitis, 8.2% granulomatosis with polyangiitis (Wegeners), 6.8% Takayasus arteritis. 6% lusus naturae cell arteritis, 4% polyarteritis nodosa, 2.1% microscopic polyangiitis, 0.6% eosinophili c granulomatosis with polyangiitis (Churg-Strauss), 1.8% cryoglobulinemic vasculitis, 0.3% and...