约10%的大肠癌在发现时已有肝转移,但易引起肝转移的原发部位报告极少。Hann 等通过狗的实验认为,门静脉血在肝内的分布由门脉的支配区域决定,认为人类肠癌肝转移的分布遵循着“河流路线”学说,即人类结肠癌的肝转移可能有一定的方向性。滕原章等以日本癌症研究院1946～1980年施行剖腹手术 About 10% of colorectal cancers have liver metastases at the time of discovery, but reports of primary sites that are likely to cause liver metastases are rare. According to Hann et al.’s dog experiment, the distribution of portal vein blood in the liver is determined by the dominant area of ​​the portal vein. It is believed that the distribution of liver metastases of human colorectal cancer follows the “river route” hypothesis that the liver metastasis of human colon cancer may have certain Directionality. Teng Yuanzhang and others performed laparotomy with Japanese Cancer Institute from 1946 to 1980