多发性肌炎(Polymyositis, PM)和皮肌炎(Dermatomyositis,DM)是骨骼肌非化脓性炎性肌病。PM指皮肤无损害,如肌炎伴皮疹者称DM。其临床特点是以肢带肌、颈肌及咽肌等 ...
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