肝门部胆管癌的低场MRI诊断价值

Diagnostic value of low field MRI on hilar cholangiocarcinoma

目的:总结肝门部胆管癌的低场MRI影像表现,以提高对肝门部胆管癌的认识。方法:收集经手术病理证实的肝门部胆管癌21例,均有完整的MRI影像资料。结果:MRCP对肝门部胆管梗阻水平定位准确率达100%。21例肝门部胆管癌均表现为肝内胆管不同程度"软藤样扩张",肝门部胆管狭窄、管壁增厚或软组织肿块;6例MRI肝门部可见稍长T1、稍长T2的肿块影,15例未发现明确肿块;增强扫描5例可见肿块延迟期缓慢持续强化,14例表现为管壁增厚强化、管腔狭窄。结论:低场MRI是检查肝门部胆管癌的有效方法,联合应用MRCP可显示肝门部胆管癌的特征性改变。

Objective：To explore the low field MRI imaging of findings of hilar cholangiocarcinoma, and improve the diagnostic accuracy . Methods： Twenty-one cases of hilar cholangiocarcinoma proved by pathology were studied, all the cases had intact MRI materials. Results： The localized accuracy of MRCP for hilar cholangiocarcinomas was 100%. Dilatation of the intrahepatic biliary tree in vary degree like soft vine in all 21 cases and hilar bile duct narrowed, occluded or soft tissue mass; precontrast MRI found hilar masses with fairly hyperintense on T1WI and T2WI in 6 cases, but could not found masses in 15 out of 21 cases. Masses has continued-slow and delay enhanced feature in 5 cases; bile duct wall thickened, enhanced, bile duct narrowed in 14 cases. Conclusion：Low field MRI are effective methods in hilar cholangiocarcinoma. If combination with MRCP can show the characteristic changes of hilar cholangiocarcinoma.