原发性肝癌 (下称肝癌 )是我国常见的恶性肿瘤 ,年病死率仅次于肺癌 ,位居恶性肿瘤病死率的第 2位[1 ] 。影响肝癌预后的重要因素是伴发门静脉癌栓 (portalveintumorthrombus,PVTT) ,其发生率高达 62 2 %～ 90 2 % [2 ] ,如不经治疗大多在确诊 3～ 4个月内死亡[3] 。迄今肝癌 Primary liver cancer (hereinafter referred to as liver cancer) is a common malignant tumor in our country. The annual mortality rate is second only to that of lung cancer, ranking the second in the case of malignant tumor [1]. An important factor that affects the prognosis of HCC is portal vein tumor thrombus (portal vein tumor), which is as high as 62 2% to 90 2% [2]. Most of patients died within 3 to 4 months without treatment [3] . Liver cancer so far