脑单发转移瘤的MRI征象分析  

Analysis of MRI manifestations of solitary metastasis in brain

作　　者：刘勇[1] 罗丽[2] 宋震宇[1] 黄冰峰[1] 

机构地区：[1]泸州医学院附属中医院放射科,四川泸州646000 [2]泸州医学院附属医院放射科

出　　处：《西部医学》2011年第9期1786-1788,共3页Medical Journal of West China

摘　　要：目的探讨脑单发转移瘤的MRI征象。方法搜集35例经临床病理证实为脑单发转移瘤患者的MRI资料,对肿瘤部位、形态大小、信号表现、强化情况进行分析总结。结果大脑半球28例,小脑6例,脑室内1例。为巨块状、团块状、结节状肿块,囊实性17例,实性13例,囊性5例。T1WI囊壁和壁结节、实性瘤灶为等或稍低信号,T2WI为稍高信号;囊性成分T1WI为低信号,T2WI为高信号;DWI肿瘤边界清楚,病灶呈低信号。增强后不规则环状强化22例,囊壁及壁结节明显强化;团块状、结节状明显强化13例。部分肿瘤周围水肿显著,10例表现为"小瘤灶、大水肿"。结论脑单发转移瘤MRI表现具有一定的特征性,可作为临床诊断的重要依据。Objective To discuss the MRI imaging features of solitary metastases.Methods 35 cases of solitary metastases confirmed by clinical pathology as the MRI materials,lesion site,shape size,signal and enhance performance were analyzed retrospectively.Results The locations of lesions included： cerebral（n=28）,cerebellum（n=6） and brain ventricle（n=1）.Solid and cystic lesions（n=17）,substantive lesions（n=13）,cystic lesions（n=5）.MRI findings as follows： the capsule wall,mural nodule and substantive lesions manifested isointensity or slightly hypointensity on T1WI and slightly hyperintense on T2WI;cystic lesions manifested hypointensity on T1WI and hyperintense on T2WI.The boundary of lesions were distinct and hypointense on DWI.After enhanced scan,irregular cricoids enhancement（n=22）,capsule walls and mural nodules were significantly enhanced;regimental or nodosity obviously enhancement uniformly in substantive lesions（n=13）.Some tumors with significant peripheral edema,small lesion accompanied with significant peripheral edema in 10 cases.Conclusion The characteristic MRI features of solitary metastases has value of the clinical diagnosis.

关 键 词：颅脑 单发转移瘤 磁共振成像 

分 类 号：R445.9[医药卫生—影像医学与核医学]