重症肌无力(myasthenia gravis,MG)是由自身免疫反应引起的神经骨骼肌接头功能障碍所导致的一组以骨骼肌病态性疲劳为特征的临床症候群,严重者可累及呼吸肌,威胁患者生命。约10%～15%的MG患者伴有胸腺瘤[1]。内科治疗主要包括应用抗胆碱酯酶药物、肾上腺皮质激素冲击辅以免疫抑 Myasthenia gravis (MG) is a group of clinical syndrome characterized by dyskinesia of skeletal muscle caused by dysfunction of neural skeletal muscle caused by autoimmune reaction. In severe cases, it can affect the respiratory muscles and threaten the life of patients. About 10% to 15% of MG patients with thymoma [1]. Medical treatment, including the application of anticholinesterase drugs, adrenal cortex hormones supplemented with immunosuppression