原发性脑淋巴瘤MRI和MRS表现  

MRI and MRS characteristics of primary brain lymphomas

作　　者：朱旻钰[1] 葛锐 阮怀军[1] 

机构地区：[1]安徽医科大学第四附属医院放射科,合肥230000 [2]合肥市仁济医院磁共振室,230000

出　　处：《安徽医学》2013年第3期318-320,共3页Anhui Medical Journal

摘　　要：目的探讨脑原发性淋巴瘤的MRI和磁共振波谱分析(MRS)表现。方法 11例经穿刺活检或术后病理证实为脑淋巴瘤的患者,均行常规MRI和MRS检查,回顾分析其影像学表现。结果 8例单发,3例多发,病灶位于皮层下白质6例、基底节区2例、胼胝体3例,T1WI显示6例呈等信号,5例呈低信号,T2WI显示3例呈等信号,8例呈高信号,增强后病灶均明显强化,其中5例可见握拳征,瘤体周围见轻、中度水肿;11例MRS显示:Cho升高,NAA、Cr降低,6例见Lip峰;病理证实均为B细胞淋巴瘤。结论综合分析常规MRI、MRS表现可以对原发性脑淋巴瘤作出正确诊断。Objective To explore the MRI and MRS appearances of the primary brain lymphoma. Methods Eleven cases with pri- mary brain lymphoma proved by pathology underwent conventional MRI and MRS. Results There were 8 cases with single lesion and 3 cases with multiple lesions. Tumors located in subcortical white matter in 6 cases, basal ganglia in 2 eases, corpus eallosum in 3 cases. On T1WI im- ages, 6 lesions were iso-intensity and 5 lesions were hypointensity; on T2WI images, 3 lesions were iso-intentsity and 8 lesions were hyperin- tensity. All of tumors were highly enhanced after contrast media injection, among which 5 lesions showed fist sign. Edema surrounding tumorwas light or moderate. MRS showed that Cho increased accompanied NAA and Cr decreased,and Lip peak could be seen in 6 cases which con- firmed were B cell lymphoma by pathology. Conclusion Comprehensive analysis of MRI and MRS characteristics has important value in the diagnosis of primary brain lymphoma.

关 键 词：脑淋巴瘤 磁共振成像 磁共振波谱 

分 类 号：R739.4[医药卫生—肿瘤]