Case report: dramatic recovery of lung adenocarcinoma-associated dermatomyositis with targeted lung cancer therapy alone.

This case report details the sudden onset of severe dermatomyositis (DM) symptoms followed by rapid progression of adenocarcinoma of the lung and an obvious diminution of the primary tumor with the administration of lung cancer targeted drug therapy alone, followed by nearly complete disappearance of the DM symptoms, with no conspicuous improvement in the DM symptoms when using corticosteroids.