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目的：探讨颅底异位脑膜瘤临床特征及诊治要点。方法：对１６例患者的有关临床资料进行分析总结。结果：首诊患者仅１例临床拟诊为脑膜瘤。全部行手术治疗。术后经１～２６年随访，２例复发，２例失访。肿瘤以鼻腔、鼻窦、眼眶及颅底骨多发，男性多于女性，平均发病年龄３５．５岁，生长较慢，少有恶性变。结论：颅底异位脑膜瘤临床诊断困难，确诊靠病理检查，影像学检查难以定性，但对肿瘤范围、大小，特别是与颅内是否相关有决定意义，对病理特点不典型者尚须免疫组化检查。应行根治性切除术治疗。颅底异位脑膜瘤较硬脑膜内者血运差，手术中出血量不多，一般不需动脉结扎或动脉栓塞。
Objective: To investigate the clinical features and diagnosis and treatment of skull base ectopic meningiomas. Methods: The clinical data of 16 patients were analyzed and summarized. Results: Only one patient diagnosed as first diagnosed clinically as meningioma. All surgical treatment. After 1 to 26 years of follow-up, 2 patients relapsed, 2 patients lost. Tumors in the nasal cavity, sinus, orbital and skull base bone more than men, more than women, the average age of onset 35.5 years old, slow growth, few malignant transformation. Conclusion: It is difficult to diagnose skull base ectomepioma clinically. It is hard to diagnose by pathological examination and imaging examination. However, it is decisive for tumor size and size, especially whether it is related to intracranial tumor, or immune to atypical pathological features Group check. Radical resection should be treated. Hematoma ectopic skull base dysplasia blood within the poor, small amount of bleeding during surgery, generally do not need arterial ligation or arterial embolism.