囊性脑膜瘤的MRI影像特征及其意义

MAGNETIC RESONACE IMAGING OF CYSTIC MENINGIOMA AND ITS SIGNIFICANCE

①目的 探讨囊性脑膜瘤MRI影像特征与组织病理学类型的关系及其外科意义。②方法对 18例囊性脑膜瘤的影像学特征、临床表现、手术发现及组织病理学类型进行回顾性分析。③结果 MRI扫描诊断正确率为 83%。MRI增强扫描 (CEMR)可区分Ⅱ型和Ⅲ型囊性脑膜瘤。Ⅱ型囊壁有强化 ,Ⅲ型囊壁无强化。④结论MRI检查对囊性脑膜瘤的诊断正确率较高。CEMR检查对于是否切除其囊壁可提供关键信息。

Objective To discuss the imaging features of cystic meningiomas and the relationship with the histopathological type, and to analyze their surgical implications. Methods The imaging study, clinical history, operative and histopathological findings of 18 patients with cystic meningiomas were reviewed retrospectively. Results Magnetic resonance imaging(MRI) had a diagnostic accuracy of 83%(15 of 18 patients). MRI with contrast enhancement(CEMR) could distinguish Type Ⅱand Type Ⅲ cystic meningiomas. Cystic wall enhancement was seen in Type Ⅱ, while not in Type Ⅲ cystic meningiomas. Conclusion MRI can providea high diagnostic accuracy for cystic meningiomas. CEMR can provide critical information regarding the necessity of surgical removal of the cystic wall.