Idiopathic eosinophilic myositis associated with vasculitis and symmetrical polyneuropathy

We present a 79-yr-old white woman admitted to the hospital with diffuse myalgias and muscle weakness associated with eosinophilia. Examination of a muscle biopsy section revealed eosinophilic myositis with vasculitis. This association is infrequent and we describe the first case report with symmetrical polyneuropathy. The treatment with prednisone (60 mg/day) led to a complete clinical-pathological recovery of the disease. We review the differential diagnosis and the aetiopathogenic mechanism.