第三脑室脑膜瘤（九例报告及文献回顾）

Meningioma of the third ventride： nine cases report and review of the literature

目的探讨第三脑室脑膜瘤的组织发生学、临床特点和外科治疗。方法报道9例经影像学、手术和病理学证实的第三脑室脑膜瘤，并回顾相关文献。结果第三脑室前部脑膜瘤5例，第三脑室后部脑膜瘤4例，平均发病年龄25．6岁，无明显性别差异；最常见的症状是梗阻性脑积水，缺乏硬脑膜附着为其影像学特征。肿瘤全切除6例。结论第三脑室脑膜瘤是一种罕见的脑室内脑膜瘤，起源于中间帆脉络组织或脉络丛，经半球间裂-胼胝体-穹隆间入路是合理的手术路径选择。

Objective To discuss the histogenesis, clinical features and surgical treatment of meningioma of the third ventricle （M-TV）. Methods Nine meningiomas that were verified clinically located in the third ventricle were reported, and relevant literatures were reviewed. Results There were five and four meningiomas of the anterior and posterior third ventricle. The patients presented symptoms at 25.6 years of age on average without significant sexual priority. Obstructive hydrocephalus was seen in all nine patients. The radiological characteristic of M-TV was that all the tumors lacked in dural attachment. Gross total resection of the tumor was achieved in six patients. Conclusions M-TV is extremely rare subtype of intraventricular meningioma that originates from tela choroidea of velum interpositum or choroid plexus. Our results suggest that interhemispheric transcallosal interfornicial approach is reasonably dictated when M-TV is considered.