脾脏错构瘤的磁共振成像诊断与分析

The diagnosis and analysis of splenic hamartoma in MRI

目的探讨脾脏错构瘤(SH)的磁共振成像(MRI)特点,以提高对该病的诊断正确性。方法搜集经手术病理证实的脾脏错构瘤13例,回顾性分析其MRI表现特点。结果单发10例,多发3例。MRI平扫T1WI呈等、稍低信号,T2WI上9例呈低信号为主混杂信号,4例病灶主体呈高信号。动态增强扫描,9例动脉期病灶呈不均匀轻度强化,门脉期、延迟期呈渐进性强化,4例动脉期病灶不均匀明显强化,门脉期持续强化,延迟期接近或稍高于脾脏信号。结论脾脏错构瘤MRI表现具有一定的特征性,T2WI信号特点及动态增强扫描具有较高诊断价值。

Objective To investigate the MRI characteristics of splenic hamartoma and to improve it′s diagnostic accuracy. Methods Thirteen cases of SH proved by surgery and pathology were retrospectively analyzed. Results Ten cases showed single lesions and 3 cases showed multiple lesions. The lesion was isointense or slightly hy-pointense on T1 WI and heterogeneous hypointense（n =9） or hyperintense（n =4） on T2 WI. With dynamic contrast-enhanced images,9 cases showed slight diffuse heterogeneous enhamcement on early dynamic images and demonstrated progressive enhancement on delay dynamic images, 4 cases demonstrated homogeneous enhancedment on early dy-namic images and all lesions presented isointensity or slight hyperintensity relative to normal spleen parenchyma on delayed phase images. Conclusion Splenic hamartoma showed somewhat charcreristics on MRI and MRI could demonstrate higher diagnositc value for splenic hamartoma.