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目的研究少见部位脑膜瘤MRI表现的临床意义。资料与方法回顾性分析10例少见部位脑膜瘤患者的MRI表现及手术病理资料。结果脑实质脑膜瘤3例,侧脑室脑膜瘤2例,嗅沟脑膜瘤2例,颅骨脑膜瘤2例,鞍隔脑膜瘤1例。10例中9例为实质性,仅1例脑实质内肿瘤为囊实性。肿瘤在T1WI、T2WI信号接近脑皮层信号,扩散加权成像(DWI)信号均高于脑实质,增强扫描呈明显强化。对邻近组织无破坏者6例;术中发现肿块血供丰富,6例肿块边界清楚,有较完整包膜,4例呈侵袭性生长。结论充分认识少见部位脑膜瘤的MRI表现对定性诊断有重要价值。
Objective To study the clinical significance of MRI findings of meningiomas in rare sites. Materials and Methods Retrospective analysis of MRI findings and surgical pathology data of 10 cases of meningioma in rare sites. Results 3 cases of parenchyma meningioma, 2 cases of lateral ventricle meningioma, 2 cases of olfactory groove meningioma, 2 cases of skull meningioma and 1 case of segmental meningioma. Nine of 10 cases were substantial, with only 1 case of parenchyma in the parenchyma. Tumors in T1WI, T2WI signal near the cortex signal, diffusion weighted imaging (DWI) signals were higher than the brain parenchyma, enhanced scan was significantly enhanced. No damage to adjacent tissue in 6 cases; intraoperative blood mass was found abundant, clear mass of 6 cases, a more complete capsule, 4 were invasive growth. Conclusion It is of great value for qualitative diagnosis to fully understand the MRI findings of meningiomas in rare sites.