Conclutions It is nessesary for the patients described above to perform CT MRI and visual field, to be made for a definite diagnosis in order to avoid delaying the treatment opportunity.

• 结论：对视力下降及视野缺损的病人一定要全面查体，进行必要的CT、MRI及视野检查，做出明确诊断，以免延误治疗时机。