Conclusion: eosinophilic granuloma frequently diffusely infiltrating dura matter, completely remove the lesion and appropriately deal with the dura matter are the key points of the operation.

• 结论：嗜酸性肉芽肿常出现硬膜浸润，彻底清除病灶及对硬膜的恰当处理是手术治疗的关键。