摘要
目的：研究ＭＲＩ诊断恶性脑膜瘤特征性表现的可靠性及限制。材料和方法：回顾性分析５０例恶性脑膜瘤的ＭＲＩ表现，与手术病理相对照，同时随机抽取同期５０例良性脑膜瘤加以比较研究。结果：５０例恶性脑膜瘤中，男女之比为１．５：１；ＭＲＩ显示恶性脑膜瘤多呈不规则形（３５／５０），轮廓常呈分叶状（１５／５０），结节状（１２／５０）和锯齿状（８／５０），包膜常不完整（２８／５０），瘤内信号多不均匀（２１／５０），造影后瘤内不均匀强化多见（２６／４０），脑膜尾征以粗短不规则为特征（９／１３），与良性组比较有统计学意义（ｘ２检验：Ｐ＜０．０５）。病灶部位、大小、边缘及瘤周水肿良、恶性者比较无统计学意义。结论：本组术前定位诊断正确率为１００％，定性诊断正确者仅１例，回顾性分析定性诊断正确率可达８６％。因此提高认识、足够重视，恶性脑膜瘤的术前定性诊断正确率将明显提高。
Purpose:To assess the reliability and limitation of the MRI diagnosis of the malignant meningiomas. Materials and Methods: We retrospectively analyzed MRI appearance,operative and pathological findings of fifty patients with malignant ones. We took further a comparative study of 50 patients with benign ones to be made randomly during those period. Results:Among fifty patients with malignant ones,the male:female ratio was 1.5:1.MRI findings were,irregular outline (35/50) with lobulation (15/50),nodule or mushrooming(12/50) and serration(8/50),incomplete capsule(28/50),inhomogenous intensity and inhomogenous contrast enhancement within a lesion(21/50, 26/40), pyknic irregular tail sign(9/13).All results had statistic significance with benign meningiomas(x2 test: P< 0.05).There were no statistic significance about the location,size,margin and peritumoral edema between benign and malignant ones. Conclusion: Preoperative localization rate was 100%and qualitative diagnosis of only one patient was malignant meningioma in our groups.Retrospectively qualitative diagnosis on MRI was 86%. We concluded that preoperative qualitative of the MRI will be incerased if we are good aware of malignant meningiomas.
出处
《中国医学计算机成像杂志》
CSCD
1995年第1期10-14,共5页
Chinese Computed Medical Imaging
