蝶鞍旁巨大动脉瘤有时与蝶骨嵴部位和鞍区肿瘤难以鉴别，当该部位巨大动脉瘤破裂致脑内血肿时，往往病情凶险，手术相当困难。我科１９９５年２月～１９９７年６月收治４例，报告如下。１临床资料例１，女，３１岁。右眼视力减退，眼球突出３年，月经紊乱３个月。于１９９... Parasagittal gigantic aneurysms are sometimes difficult to discriminate from sphenoid iliac crest and saddle area tumors. When a large aneurysm ruptures in the site, the intracerebral hematoma results in a dangerous condition and the operation is very difficult. In our department from February 1995 to June 1997, 4 cases were treated. The report is as follows. 1 Clinical data Example 1, female, 31 years old. Right eye vision loss, eyeball protruding for 3 years, menstrual disorders for 3 months. In 199...