第十二章幼年型皮肌炎【概述】幼年型皮肌炎（juveniledermatomyositis，JDM）是一种多系统疾病，特点是横纹肌和皮肤的急性或慢性的非化脓性炎症，早期存在不同程度的闭塞性血管病，晚期发生钙化。
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