门静脉癌栓肝脏血供变更的CT表现

目的探讨门静脉癌栓血流动力学变化及肝脏周边区动脉期异常强化的发生机制.方法回顾分析30例经CT和血管造影证实的中晚期肝癌28例,转移癌2例同时并发门静脉癌栓形成的影像学资料.结果30例门静脉癌栓中在主干、左、右支同时存在的有18例,主干癌栓3例,左、右支癌栓9例.门静脉海绵样变26例,CT表现为肝门、肝裂、胆囊窝增粗成团的血管影.在30例中,肝脏周边区动脉期异常强化10例.结论门静脉癌栓后侧枝循环形成海绵样变,仍能维持肝脏的血供,肝脏周边区动脉期异常强化提示肝脏血供变更,门静脉血供减少,动脉血供代偿增加.

CT Appearances of Liver Hemodynamic Change in Patients with Tumor Embolismus in Portal Vein

Objective To study the hemodynamic change and the machanism of anomalous enhancement of hepatic peripheral area in arterial phase in patients with tumor embolismus in portal vein.Methods The imaging data in 30 cases of hepatic carcinoma (hepatic cell carcinoma in 28 cases and metastatic carcinoma in 2 cases)with tumor embolismus in portal vein confirmed by CT and angiography were reviewed and analysed.Results The tumor embolism were formed in portal stem vein is 3 cases,portal stem vein right and left branches in 18 cases,and right and left branches in 9 cases.The cavernous transformation of portal vein was in 26 cases.The blood vessel grouped and thickened in hepatic portal,the fissure of liver and fossa of gallblader were showed on CT.The hepatic peripheral area was enhanced in arterial phase in 10 cases.Conclusion The collateral branch underwent cavernous transformation after formation of tumor embolism in portal vein the liver blood supply is still maintain.The hepatic peripheral area in arterial phase are anomalously enhanced,it is suggested that the portal vein blood supply is reduction and the arterial blood supply is complemently increased.