原发性肝癌最主要的转移方式是就近侵犯邻近门静脉分支，在内形成肿瘤栓子，并逆行生长延至段、叶甚至门静脉主干形成癌栓［１］。ＣＴ增强扫描是显示门静脉癌栓无创伤的重要方法之一。１材料和方法１９９０年５月～２０００年５月ＣＴ检查原发性肝癌１０５０例，其中合并门静 Primary liver cancer metastasis is the most recent violation of adjacent branches of the portal vein, the formation of tumor emboli, and retrograde growth delay to the segment, leaf and even portal vein thrombosis [1]. CT enhanced scan is one of the important methods to show the noninvasive portal vein tumor thrombus. 1 Materials and Methods May 1990 ~ May 2000 CT examination of 1050 cases of primary liver cancer, which merged with the door