周围型肝内胆管细胞癌的MR诊断价值

The Value of MRI in Diagnosing Intrahepatic Peripheral Cholangiocarcinomas

目的:探讨周围型肝内胆管细胞癌(PCC)的MRI诊断价值。方法:回顾性分析经病理证实的PCC患者14例,对MR平扫及动态增强扫描的资料进行分析。结果:14例PCC块状型8例,结节型4例,弥漫型2例。于T1WI、T2WI主要表现为混杂的异常信号,MR动态增强扫描13例动脉期瘤灶边缘淡薄环形或不规则强化、静脉期及延迟期扫描瘤灶内实性部分的信号呈渐进性、填充式增强,强化程度更加明显,1例动脉期扫描瘤灶边缘明显强化,延迟扫描瘤体边缘仍保持厚环状明显强化。其他表现包括瘤内含有扩张胆管7例,腹膜后淋巴结转移者5例,均无门静脉癌栓。结论:PCCMR平扫及动态增强扫描具有一定的特征性,可为PCC的MR诊断及鉴别诊断提供重要的根据。

Objecive：To explore the value of MRI in diagnosing intrahepatic peripheral cholangiocarcinoma （PCC）. Methods： MRI findings of 14 cases of PCC proved operatively and pathologicaly were reviewed retrospectively. Results：14 cases of PCC were classified into nodus type （n=4） ,mass type （n=8） and diffuse type （n=2）. All the cases showed irregular and mixed intensity on T1WI and T2W1. On dynamic contrast enhancement images slightly peripheral enhancement in early phase and progressive and concentric contrast filling in delayed phase were the main features of Pets. Only 1 case showed obvious peripheral contrast enhancement in all enhanced scanning phases. The other signs, included bile duct dilation within tumors,and lymphnode metastases. Tumor thrombosis in portal veins was not observed. Conclusion： MRI examinations （plain scans and dynamic contrast enhancement images） can provide the basis of the diagnosis and differential diagnosis of PCCs.