边缘型肝胆管癌的螺旋CT双期增强扫描研究

Study of intrahepatic peripheral cholangiocarcinoma:two-phase spiral CT findings

目的:研究边缘型肝胆管癌螺旋CT双期扫描的表现特点。材料与方法:29例边缘型肝胆管癌患者,分别于注药后30s,65s获得肝动脉及门静脉双期图像,所有病例均经手术或穿刺活检证实。结果:所有肿块均呈边缘不规则的低或略高密度灶,CT值14～41Hu。增强CT表现:肝动脉相及门静脉相可见菲薄、不连续的环形轻度强化,在双时相间变化不明显,且在低密度肿块内部可见轻度不规则的强化区,绝大部分瘤体可不强化或仅轻度强化。结论:边缘型肝胆管癌的特征性CT表现是:瘤体较大,密度较低,边缘不规则。增强扫描于肝动脉相及门静脉相可见菲薄、不连续的环形轻度强化,在双时相间变化不明显,且在低密度肿块内部可见轻度不规则的强化区。

Objective:To study the findings of intrahepatic peripheral cholangiocarcinoma (IPC)at two-phase spiral CT.Materials and Methods:All29IPC cases had undergone two-phase spiral CT.Hepatic arterial phase and portal venous phase images were obtained at30s and65s respectively,after the infusing of contrast material.All cases had been proved at histo-pathologic examination or at percutaneous needle biopsy.Results:The edge of all tumors were irregular and the attenuation was low.There was thin,incomplete rimlike contrast enhancement at the tumor periphery and had no obvious change be-tween the hepatic arterial phase and portal vein phase,an amorphous area of slight enhancement in the definite low attenuation region was seen.Most of the tumors had no enhancement or slight enhancement .Conclusion:The typical finding of IPC are:large,low attenuation tumor with irregular margin,thin,incomplete rimlike contrast enhancement at the tumor periphery with no apparent change between the hepatic arterial phase and portal vein phase,amorphous areas of slightly enhance in low attenuation region.