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Malignancy in dermatomyositis and polymyositis - UpToDate

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Malignancy in dermatomyositis and polymyositis INTRODUCTION Dermatomyositis (DM) and polymyositis (PM) are idiopathic inflammatory myopathies characterized by proximal skeletal muscle weakness and evidence of muscle inflammation. DM, unlike PM, is characterized by the presence of various cutaneous manifestations. DM and PM may also be associated with inflammatory arthritis, interstitial lung disease, Raynaud phenomenon, and the presence of autoantibodies. An association between inflammatory myopathy and cancer has been recognized since the report of two cases of PM and gastric cancer in…

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