脑膜瘤的MRI表现与病理分级的相关性

Correlation of MRI findings with pathological grading in meningioma

目的 :探讨脑膜瘤的病理分级与MRI表现的相关性。方法 :对 5 8例经MRI检查并经病理证实的脑膜瘤 (其中Ⅰ级 2 2例、Ⅱ级 17例、Ⅲ级 19例 )进行回顾性对比分析 ,观察肿瘤形态、信号均匀度、强度、肿瘤边界、强化均匀度以及瘤周水肿程度等指标。结果 :肿瘤的形态、边界、强化均匀度及其对周围结构的侵袭与病理分级具有相关性 (P <0 .0 5 ) ,而肿瘤的水肿程度、信号强度不能反映肿瘤的病理级别。结论

Objective:To investigate the correlation of MRI features with pathological grading in meningioma.Methods:MRI findings in 58 patients with meningioma,including 22 cases of grade Ⅰ,17 cases of grade Ⅱ and 19 cases of grade Ⅲ,were retrospectively analyzed.The tumor contour, signal homogeneity and intensity after contrast administration,the border and peritumoral edema were evaluated. The MRI features were compared with the pathological grading.Results:The tumor contour,the border between the tumor and the brain,the signal homogeneity after contrast administration and invasion of adjacent structures are related to the grading of meningioma, while peritumoral edema and signal intensity can't suggest malignant manner.Conclusion:Some of MRI features in meningioma play important roles in evaluating the grading of meningioma before operation and guiding therapy.