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Dermatomyositis ((dermatomyositis, DM) is a kind involving the skin and muscles of idiopathic inflammatory myopathies (idioPathic inflammatory myoPathies, IIM), with periorbital edema, erythema and progressive symmetrical proximal limb weakness as the main symptoms on its pathogenesis, although proposed many theories , but still clear . unusual for the onset of autoimmune pathology , various cytokines , chemokines and adhesion molecules involved in the immune process , and the environment induced by infection factors , in addition , heredity, certain tumors associated with its occurrence . elucidate the pathogenesis of dermatomyositis , for guiding the clinical diagnosis and treatment is important.
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