脑室内脑膜瘤起源于脑室系统的脉络丛组织。临床上属于少见的脑膜瘤类型，其中又以起源于侧脑室脉络丛的侧脑室内脑膜瘤最为多见。早期神经系统损害不明显，就诊时肿瘤多已较大，多数病人已出现颅内压增高的表现，故常见头痛、视盘水肿。
目的分析脑室内脑膜瘤的MRI特点，提高诊断准确性。
Objective To analyze the MRI findings and the clinical features of meningioma in ventricles in order to improve diagnostic accuracy.
目的：提高侧脑室内脑膜瘤的CT和MRI诊断的正确性。
Purpose: To improve the CT and MRI diagnostic accuracy of meningiomas of the lateral ventricles.
目的：探讨脑室内脑膜瘤mri的特点，提高其诊断及鉴别诊断水平。
Purpose: To study the MRI characteristics of meningioma in the cerebral ventricles, improve diagnosis and differential diagnosis.
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