Liver is a very important digestive organ in human body, and it is also a good organ for many diseases. Liver cancer is very familiar to everyone, Mr. Fu Biao, a famous movie and TV actor, died of liver cancer, and he was unable to recover from the disease even with 2 liver transplants, and finally died at the age of 43. Therefore, it is difficult to cure malignant tumors, especially advanced malignant tumors by surgery. So, what is the difference between liver metastatic cancer and liver cancer? Liver metastatic cancer is often a tumor originated from other organs and transferred to liver through blood system, such as colorectal cancer liver metastasis, lung cancer liver metastasis, gastric cancer liver metastasis, gastric mesenchymal stromal tumor liver metastasis, because liver has rich blood supply and developed vascular system, so it also provides convenient conditions for invasion, growth and reproduction of metastatic cells. However, we remember that liver metastatic cancer is different from liver cancer, the characteristics of metastatic cancer cells are similar to the primary foci, for example, the biological behavior of colorectal liver metastatic cells is similar to that of colorectal cancer cells (this is like saying that Chinese people who migrated to the United States are still of Chinese descent), therefore, we can consider the therapeutic regimen for the primary disease in our treatment, that is to say, chemotherapy of liver metastasis of colorectal cancer should be based on the chemotherapy regimen of colorectal cancer. regimen for colorectal cancer liver metastasis, and chemotherapy for lung cancer liver metastasis should be according to the regimen for lung cancer.