脑干胶质瘤的磁共振诊断

MR DIAGNOSIS OF BRAINSTEM GLIOMAS

目的：探讨脑干胶质瘤的磁共振（ＭＲ）特征。方法：回顾分析手术和病理证实的３８例脑干胶质瘤的临床资料。所有病人都作了轴位、矢状位或（和）冠状位的ＭＲ常规扫描，３６例作了增强检查。结果：脑干增大膨突３５例，肿瘤效应３５例，基底动脉包埋征６例，脑积水３例。肿瘤为Ｔ２ＷＩ高信号、Ｔ１ＷＩ低信号。２９例有对比增强，表现为片状、结节或肿块状、环状、结节－环状等。３８例病理均证实为星形胶质细胞瘤。结论：ＭＲ是诊断脑干胶质瘤最理想的影像方法。脑干增大膨突、信号异常、片状、结节或肿块状、环状强化为其特征。

Objective: To study the MR characteristics of brainstem gliomas Methods: 38 cases of brainstem gliomas verified pathologically were retrospectively analysedAll of patients were given conventional MR scan on axial,sagittal or/and coronal plane36 cases were given contrastenhanced examination Result: 35 cases showed brainstem enlarging and expanding;35 cases tumor effect,6 cases basilar artery encasing,3 cases hydrocephalusTumors showed highsignalintensity on T2 WI,but lowsignalintensity on T1 WI;29 cases displayed patch,nodule or mass,rimlike,nodule and rimlike enhancement Conclusion: MRI is excellent method in diagnosis of brainstem gliomasBrainstem enlarging and expanding,abnormal signal intensity,patch,nodule or mass,rimlike enhancement are MRI characteristics of brainstem gliomas\=