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多发性肌炎与皮肌炎属自身免疫疾病,躯干附近的四肢连带肌呈对称性乏力,运动疼痛、握痛,血中谷草转氨酶(GOT)、血清肌酸磷酸激酶同功酶(CPK),乳酸脱氢酶(LDH)、果糖二磷酸醛缩酶等来自肌肉的酶呈现高值可作为诊断上的参考。确诊时,可见肌电图上呈特异性肌原性异常所见,障碍肌活检的重要所见有肌纤维变性、坏死,以及单核细胞(淋巴细胞、巨噬细胞等)向血管周围或间质、肌纤维内浸润。多发性肌炎与皮肌炎的关系:在皮肌炎,有并发两上眼睑淡紫色疹及双手指关节
Polymyositis and dermatomyositis are autoimmune diseases. Symmetrical weakness of the extremities and ligaments around the torso, motor pain, grip pain, aspartate aminotransferase (GOT), serum creatine phosphokinase isoenzyme (CPK) High values of muscle-derived enzymes such as lactate dehydrogenase (LDH) and fructose bisphosphate aldolase can be used as a diagnostic reference. Confirmed, we can see the EMG showed myogenic abnormalities seen, the main findings of muscle biopsy muscle myofibrosis, necrosis, and mononuclear cells (lymphocytes, macrophages, etc.) to the perivascular or interstitial , Infiltration of muscle fibers. Polymyositis and dermatomyositis in the relationship: In dermatomyositis, there are two cases of eyelid lacrimal rash and both hands and knuckles