原发性脑内淋巴瘤的MRI诊断

Diagnosis of primary lymphoma in the brain with magnetic resonance imaging

目的探讨原发性脑内淋巴瘤(PBL)的MRI征象,以提高其术前诊断水平。方法回顾性分析12例经手术病理证实的PBL的MRI表现。结果本组12例患者,男10例,女2例,平均年龄57.2岁;病灶大多位于脑实质深部近中线部位,单发或多发,MRI平扫T1WI呈等、稍低信号,T2WI呈等或稍高信号,DWI上多呈均匀高信号,增强扫描病灶大部分呈团块状或结节状均匀性强化。结论原发性脑内淋巴瘤大多较具有典型的MRI特征,MRI对原发性脑内淋巴瘤的诊断具有一定的诊断价值。

Objective To discuss the MRI features of primary intracranial lymphoma,and improve the accuracy of diagnosis.Methods MRI findings of 12 patients with primary brain lymphoma confirmed by operation and pathology were analyzed retrospectively.Results 10 male and 2 female cases,with the average age of 57.2,were analyzed.The lesions were mostly located in the middle of brain.The lesions demonstrated isointensity signal or slightly hypointensity signal on T1WI,and slightly hyperintensity signal or isointensity signal on T2WI.After Gd-DTPA injection,the lesions took on obvious enhancement.Conclusion Most primary intracranial lymphomas have typical MRI features.MRI can serve an aid to the diagnosis of primary lymphoma in the brain.