MRI动态增强对肿块型周围型肝内胆管细胞癌的诊断价值

目的评价MRI动态增强对肿块型周围型肝内胆管细胞癌的诊断价值。方法回顾性收集、分析17例经病理证实的肿块型周围型肝内胆管细胞癌MRI资料。所有病例均进行MRI动态增强扫描。分析肿瘤的位置、大小、数目、边缘、信号特征、伴随表现及动态增强表现。结果 17例肿瘤大小平均为3.1±1.6cm;平扫T1WI表现为混杂稍低信号,T2WI表现为混杂稍高信号;MR动态增强扫描时,13例动脉期瘤灶周边薄边环形强化,4例动脉期扫描瘤灶边缘强化不明显,17例病例在静脉期和延迟期时病灶呈渐进性、填充式向心性强化;其他征象包括:13例有病灶周围胆管扩张,4例有包膜回缩征,2例有卫星灶,6例有肝门及腹膜后淋巴结肿大。结论 MRI动态增强对肿块型周围型肝内胆管细胞癌的诊断有重要的价值。

Peripheral intrahepatic mass-type cholangiocarcinoma:Value of dynamic contrast enhancement MRI

Objective To explore the value of dynamic contrast enhancement MRI in the peripheral intrahepatic mass-type cholangiocarcinoma.Methods Dynamic enhanced MRI images of 17 cases with pathologic-confirmed peripheral mass-type cholangiocarcinoma were retrospectively reviewed.The lesion location,site,number,margin,signal,accompany signs and size,signal intensity and the dynamic contrast enhancement MRI features were evaluated.Results The mean size of the 17 tumors is 3.1 1.6 cm.On un-enhanced MRI,all of the 17 cases demonstrated heterogeneous hypointensity on T1WI and mixed hyperintensity on T2WI.On dynamic contrast enhancement T1WI images,peripheral rim enhancement was depicted on artery phase in 13 cases and without obvious enhancement in 4 cases,while all of the 17 patients demonstrated concentric and progressive contrast media filling in portal venous and delayed phase.Other imaging findings included peripheral bile duct dilation in 13,liver capsule retraction in 4,and satellite nodules in 2,and regional lymph node involvement in 6.Conclusion Dynamic contrast enhancement MRI is useful for the diagnosis of peripheral intrahepatic mass-type cholangiocarcinoma.