肝内胆管腺瘤的影像与病理学分析

Imaging and pathological analysis of intrahepatic bile duct adenoma

目的:探讨肝内胆管腺瘤的影像学特征及其病理学基础。方法:分析4例肝内胆管腺瘤的病理及影像资料。结果:肿瘤位于肝包膜下、类圆形,CT增强呈"快进快出",边缘可见充血带影,部分病灶中心出现"心芒状"强化灶。MRI扫描呈T_1WI低信号,T_2WI高信号,DWI及ADC图呈高信号,强化类似CT,在肝胆特异期为低信号。结论:肝实质内、近包膜下、体积较小病灶,增强延时边缘有炎性充血带或中心"心芒状"强化灶,在MRI肝胆特异期呈低信号改变,而DWI扫描,其ADC图上为高信号或等信号改变时,应考虑BDA可能。

Objective： To investigate the imaging features and pathological basis of intrahepatic cholangioma. Methods： The pathological and imaging data of 4 cases of intrahepatic bile duct adenoma were analyzed. Results： The tumors were located under the envelope of the liver and round,and the enhancement of CT was ＂fast forward and fast out＂. MRI scan showed T1WI low signal and T2WI high signal. DWI and ADC map showed high signal intensity,which was similar to CT,and was low signal in hepatobiliary specific phase. Conclusion： in the liver parenchyma,subcapsular and small size focus,enhanced delayed edge with inflammatory congestion zone or central ＂heart awn＂enhancement focus,low signal change in MRI liver and gallbladder specific phase,while DWI scan. The ADC map is high signal or equal signal change,should consider BDA energy.