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本文对４２１例原发性肝癌Ｂ超诊断回顾性分析，发现伴门脉癌栓者１０７例（２５．４％）。其特点如下：受侵门脉半数以上增宽（７４．８％）；门脉内单个或多个实性光团，其中以等回声光团最多见（６１．７％）；光团边界多不规则，呈菜花样改变或爬行样生长；门脉主干受侵时，其周围可见多数蠕虫样无回声的管状结构（３８％）。发现门脉癌栓的发生及分布与肝癌肿块的类型及分布有一定关系，以弥漫型肝癌、多叶侵犯及等回声肿块癌栓发生率最高。门脉癌栓形成后以主干分布最多见，左支又较右支多见。即使小肝癌也可发生门脉癌栓。比较ＣＴ及血管造影检查，本文认为Ｂ超可作为诊断门脉癌栓的首选方法。
In this paper, retrospective analysis of 421 cases of primary liver cancer B-ultrasound revealed 107 cases (25.4%) with portal cancer thrombus. Its characteristics are as follows: more than half of the invaded portal vein (74.8%); single or multiple solid light masses in the portal vein, of which the most common is the echogenic light mass (61.7%); More irregular, cauliflower-like changes or crawling-like growth; most of the worm-like echo-free tubular structures (38%) are visible around the main portal vein. The incidence and distribution of portal vein tumor thrombus were found to be related to the type and distribution of hepatoma masses. The incidence of diffuse liver cancer, multifocal invasion, and echogenic masses was the highest. After portal vein cancer embolism was formed, it was the trunk with the most common distribution, and the left branch was more common than the right branch. Even small liver cancer can develop portal cancer thrombi. Comparing CT and angiographic examination, this article believes that B-mode ultrasound can be used as the first choice for the diagnosis of portal vein cancer emboli.