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概念与分类一、概念皮肌炎属结缔组织病范畴。临床可呈急性、亚急性和慢性经过。儿童皮肌炎是以全身广泛性血管炎病变为特点,以皮肤肌肉受累为主,亦可涉及消化道、皮下脂肪、中枢神经系统、肺、肾、心等。Karelitr于1932年首先介绍了75例皮肌炎,其中22例为儿童。儿童患者约占本病总数的15～20％,以2～8岁为多见,2岁以下发病者很少,男
Concept and classification First, the concept of dermatomyositis is a connective tissue disease category. Clinical acute, subacute and chronic. Children with dermatomyositis is characterized by extensive systemic vasculitis lesions, mainly to the skin and muscle involvement, but also may involve the digestive tract, subcutaneous fat, central nervous system, lung, kidney, heart and so on. Karelitr first introduced 75 cases of dermatomyositis in 1932, of which 22 were children. Pediatric patients account for about 15% to 20% of the total number of cases, mostly in the age group of 2 to 8 years.