Ghezzi(1984)首先报导1例重症肌无力(MG)伴发双侧球后视神经炎(RON)患者。现作者报导第2例如下:女,40岁。1969年起出现上睑下垂、复视,睁眼及吞咽困难、颈、肩胛带肌肉无力,活动后加重,休息后好转。用吡啶斯的明60mg 5次/日,症状改善。1972年又恶化,遂进行胸腺手术,术后改善,吡啶斯的明改用60mg3次/日。但1976年1月出现 Ghezzi (1984) first reported a case of myasthenia gravis (MG) with bilateral posterior optic neuritis (RON) patients. Now the author reported the second example is as follows: Female, 40 years old. 1969 ptosis, diplopia, eyes open and difficulty swallowing, neck, shoulder girdle muscle weakness, aggravating after activity, resting after the improvement. With pyridostigmine 60mg 5 times / day, the symptoms improved. In 1972 and deteriorated, then thymus surgery, postoperative improvement, pyridostigmine into 60mg3 times / day. However, in January 1976 appeared