皮肌炎与多发性肌炎(dermatomyositis and polymyositis)均属特发性炎症性肌病(idiopathic inflammatory myopathy)。

• IntroductionIdiopathic inflammatory myopathies ( IIM) , including polymyositis ( PM) and dermatomyositis ( DM) , are regarded as systemic autoimmune disorders primarily affecting the locomotor system, and with dermal as well as internal organ involvement that can vary considerably.