原发性脑淋巴瘤的MRI表现特点与诊断

目的：分析颅内原发性淋巴瘤的MRI表现特点，为临床诊断与治疗提供资料。方法：回顾分析28例经病理证实颅内原发性淋巴瘤的MRI资料，所有病例均行平扫及增强扫描。结果：病灶单发6例，多发22例，分布于幕上14例，幕下4例，幕上幕下同时存在10例，大多位于深部脑白质，病灶多呈圆形或不规则形，T1WI呈低信号，T2WI呈等或高信号，瘤周水肿较轻，增强扫描病灶均呈团块状显著强化。结论：颅内淋巴瘤的MRI表现缺乏特异性，需手术或活检才可作出定性诊断。

MRI diagnosis of intracranial lymphoma

Objective: To analysis the MRI features of intracranial lymphoma for clinical diagnosis and treatment. Methods: The MRI data of 28 cases diagnosed as intracranial lymphoma by surgery or biopsy were analyzed retrospectively. All the cases were performed by plain scan and enhanced MRI scan. Results: There were 6 cases with single lesion and 22 cases with multiple lesions. The lesions of 14 cases distributed in supratentorium, of 4 cases in inferiortentorium and of 10 cases in both supratentorium and inferiortentorium. Most of the lesions were located in the deep white matter and were round or irregular in shape. The hypointensity on T1WI and isointensity or hyperintensity on T2WI were observed. The edema surrounding the tumor was mild. The marked enhancement of the lesions was demonstrated after having been injected the contrast medium. Conclusion: The MRI manifestations of intracranial lymphoma are absent of specificity. The definitive diagnosis will be established only by surgery or biopsy.