患者：男，６２岁。因双下肢无力进行性加重半年，抬头无力１月，于１９９８年５月１６日收住入院。患者半年前无明显诱因渐感双下肢无力，行走、下蹲后站立及上下楼梯均感困难。近一月来抬头无力，头常低垂，食欲明显下降，消瘦。无肌痛及吞咽困难。曾在外院查肌酶谱正常... Patient: Male, 62 years old. Because of the weakness of both lower extremities progressive six months, the rise of weakness in January, admitted to hospital on May 16, 1998. Six months ago, there was no obvious incentive for patients with lower extremity weakness, walking, squatting and standing up and down stairs are difficult. Nearly a month to rise weakness, head often drooping, appetite decreased significantly, weight loss. No muscle pain and difficulty swallowing. Had in the outer court check muscle enzymes normal ...