老年恶性脑膜瘤35例磁共振成像特征分析  

MRI features of malignant meningioma in the elderly:an analysis of 35 cases

作　　者：石其收 邵元伟 Shi Qishou;Shao Yuanwei(Imaging Center,Shandong Provincial Dezhou Municipal Second People′s Hospital,Dezhou253004,China)

机构地区：[1]山东省德州市第二人民医院影像中心,253004

出　　处：《实用医学影像杂志》2020年第4期373-375,共3页Journal of Practical Medical Imaging

摘　　要：目的探讨老年恶性脑膜瘤的磁共振成像(MRI)影像特征。方法回顾性分析35例手术后经组织病理证实为恶性脑膜瘤患者的MRI资料,观察其MRI影像特征。结果35例恶性脑膜瘤,男性21例,女性14例;14例位于颞叶,11例位于额叶,7例位于顶叶,3例位于小脑幕区;肿瘤直径范围3.8~9.5 cm;21例肿瘤形态呈分叶状,12例呈结节状,2例形态规则;28例T1WI表现为不规则混杂等、低信号,T2WI表现为高、等混杂信号;17例可见瘤内出血改变;24例存在明显瘤周水肿。增强扫描:31例肿瘤呈明显非均匀强化,31例肿瘤可见明显脑膜尾征。结论老年恶性脑膜瘤似乎更好发于男性,肿瘤体积往往较大;MRI增强扫描呈明显强化;肿瘤形态不规则,呈分叶状、结节状、边界模糊,可见血管流空影,信号不均匀;多见粗短脑膜尾征,侵袭颅骨是其MRI影像特征。Objective To investigate the MRI features of eldly patients with malignant meningioma.Methods The MRI data of 35 patients with histopathologically confirmed malignant meningioma were retrospectively analyzed to observe the MRI performance.Results Among 35 patients with malignant meningioma,21 were male and 14 were female.The malignant meningioma was located at temporal in 14 patients,at frontal in 11,at parietal in 7 and at tentorial in 3.The diameter of the tumor ranged from 3.8 to 9.5 cm.The meningioma showed lobulated in 21cases,nodular in 12 and regular in 2.Twenty-eight cases showed irregular mixed equal and low signal on T1WI,high mixed signal on T2WI,17 showed bleeding Imaging changes.There were obvious peritumoral edema in 24 cases.By contrast-enhanced scan,31 tumors showed obvious non-uniform enhancement,and 31 cases showed obvious meningeal tail sign.Conclusion It seems that malignant meningiomas in the elderly are more likely to occur in men,and the tumor volume is relatively large with marked enhancement on MRI.the tumor morphology is irregular,showing lobulated,nodular,fuzzy boundary,visible vascular flow empty shadow,uneven signal,mostly rough and short meningeal tail sign,visible invasion of skull are its characteristic MRI imaging features.

关 键 词：恶性脑膜瘤 磁共振成像 诊断 

分 类 号：R739.45[医药卫生—肿瘤]