There are three main metastatic pathways for primary liver cancer: 1) intrahepatic metastasis; 2) outward metastasis, that is, metastasis to lung, bone and brain; 3) lymph node metastasis, which is relatively rare for hepatocellular liver cancer patients, and many gastrointestinal tumors mainly metastasize through lymph nodes, but less liver cancer metastasizes through lymph nodes. However, there is a special type of intrahepatic cholangiocarcinoma that metastasizes more through the lymph nodes in the hilar region. In addition, there is another characteristic of hepatocellular carcinoma: it ruptures and bleeds, and after rupture, it spreads cancer cells to the abdominal cavity like seeds. Therefore, intrahepatic metastasis is a kind of hematogenous metastasis, sometimes it is a multicenter metastasis, it does not necessarily mean that you metastasize there, but it happens one after another within three centimeters, not that it goes from one place to another. Therefore, the route of metastasis is always intrahepatic metastasis, and intrahepatic metastasis may also be considered a hematogenous metastasis, metastasis through the portal vein, which is also considered a direct invasion of adjacent cells, so it is also considered a hematogenous metastasis; then there is distant lung metastasis, then there is lymph node metastasis, then there is abdominal implant metastasis, and this is the approximate route of metastasis.