Keywords: نوروپاتی ایسکمیک; Antineutrophil cytoplasmic antibodies (ANCA); Granulomatosis with polyangiitis; Microscopic polyangiitis; Eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome); Polyarteritis nodosa; Mononeuritis multiplex; Ischemic neuropathy;