Objective To study the ultrastructural changes of neuromuscular junction (NMJ) in patients with lambert Eaton myasthenia syndrome (LEMS) and mitochondrial encephalomyopathy (MEMS).

• 目的观察癌性肌病（LEMS）和线粒体脑肌病（MEMS）患者的神经肌肉接头处（NMJ）超微结构变化及临床意义。