Liver metastatic cancer patients may have normal liver function test indexes at the initial stage, but when the metastatic tumor gradually increases in size or extensive metastasis occurs, it may affect the liver function and the related indexes may be abnormal. Liver is one of the organs with the richest blood supply in human body, thus it is the site where many malignant tumors are easy to metastasize, such as gastric cancer, colorectal cancer, pancreatic cancer, etc. However, because of its strong compensatory ability, liver metastasis may occur in the early stage. However, because the liver has a very strong compensatory ability, at the early stage of metastasis, the metastatic tumor may not significantly affect the normal function of the liver, and thus the liver function tests will not show obvious changes. When the metastatic tumor is increasing in size, or multiple or even extensive liver metastasis occurs, the function of normal liver tissue is seriously impaired, which may cause abnormalities of related laboratory indexes, for example, the patient may have elevated aminotransferase, elevated bilirubin, decreased albumin level, and so on, and when it is serious, it may also cause jaundice, edema, ascites, and other manifestations of liver function insufficiency. Therefore, patients with a history of malignant tumors and normal liver function tests cannot exclude the possibility of liver metastases, and it is recommended to perform imaging tests such as abdominal CT or MRI to exclude the possibility of liver metastases if necessary.