重症肌无力是一种自身免疫性疾病,可累及全身肌肉,导致眼肌、吞咽肌、呼吸肌及四肢骨骼肌无力。眼肌无力仅是全身肌肉无力的一种表现。胸腺是中枢淋巴器官,清除胸腺可阻止病情进展,故应持积极态度,尤其对病情有进展倾向者更应积极手术治疗。1　资料与方法从1990～2 0 0 2 -0 6, Myasthenia gravis is an autoimmune disease that affects the body’s muscles, causing weakness in the eye, swallowing muscles, respiratory muscles and skeletal muscles of the extremities. Myasthenia gravis is only a manifestation of generalized muscle weakness. Thymus is the central lymphoid organs, removal of the thymus can prevent the progression of the disease, it should hold a positive attitude, especially in patients with propensity to progress should be more positive surgical treatment. 1 Materials and Methods From 1990 ~ 2 0 0 2 -0 6,