肝脏假性淋巴瘤的MRI特征及文献回顾

MRI Features and Literature Review of Liver Pseudolymphoma

目的总结肝脏假性淋巴瘤的MRI特征。资料与方法结合1例临床证实的肝脏假性淋巴瘤的MRI资料,并进行相关文献检索和分析,总结肝脏假性淋巴瘤的MRI特征。结果文献共报道肝脏假性淋巴瘤37例,其中男3例,女34例;年龄15~85岁,平均55岁。病变部位均靠近肝表面。MRI表现为稍长T1、稍长T2信号,动态增强扫描环形强化为主8例,动脉期轻中度强化、门静脉期及延迟期廓清5例。本例扩散加权成像呈明显高信号,反相位图像病灶信号未减低。结论肝脏假性淋巴瘤多发生于女性,病灶多分布于近肝表面的肝实质内,MRI图像稍长T1、稍长T2信号,增强扫描环形强化为其特点。

Purpose To summarize the MRI features of liver pseudolymphoma.Materials and Methods MRI data of 1 clinically confirmed liver pseudolymphoma case was adopted for relevant literature retrieval and analysis in an attempt to summarize the MRI features of liver pseudolymphoma.Results A total of 37 cases of liver pseudolymphoma were reported in the literature,including 3 males and 34 females,aged 15 to 85 years,with an average age of 55 years.The lesions were close to the liver surface.MRI showed slightly longer T1 and T2 signals.8 cases were mainly characterized with ring enhancement under dynamic enhancement scan,and 5 cases showed mild to moderate enhancement in arterial phase,clearance in portal and delayed phase.In this case,the diffusion-weighted imaging presented obvious high signal,and the antiphase image lesion signal was not diminished.Conclusion The incidence of liver pseudolymphoma found in female patients is significantly higher than in male patients.The lesions are mostly distributed in the liver parenchyma near the surface of the liver.The MR images show slightly longer T1 and T2 signals,characterized by ring enhancement under enhancement scan.