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目的：分析影响枕大孔区脑膜瘤手术疗效的因素，比较有关手术入路的优缺点。方法：应用枕下外侧扩大入路切除枕大孔脑膜瘤11例。结果：手术全切肿瘤7例(7/11，64%)，次全切2例(2/11，18%)，部分切除2例(2/11，18%)。无手术死亡和严重的手术并发症。结论：枕下外侧扩大入路足以显露和切除枕大孔区肿瘤。肿瘤切除程度取决于肿瘤与椎动脉、脑干和颅神经的关系。
Objective: To analyze the factors influencing the curative effect of meningioma in the foramen magnum and to compare the advantages and disadvantages of surgical approach. Methods: 11 cases of macular meningiomas were removed by lateral extension of suboccipital approach. Results: Seven patients (7/11 and 64%) underwent total surgical resection, 2 subtotectomy (2/11 and 18%) and partial resection (2/11 and 18%). No surgical death and serious surgical complications. Conclusion: Enlargement of lateral suboccipital approach is enough to reveal and resect tumors in the foramen magnum. The extent of tumor resection depends on the tumor and the relationship between the vertebral artery, brain stem and cranial nerves.