Whether a tumor on the liver, which is also known as a liver-occupying lesion, is serious depends mainly on the nature of the lesion and also on the size of the lesion. Descriptions are as follows: 1. If the liver occupying lesion is a malignant tumor, that is, primary liver cancer or metastatic liver cancer, this is a very serious disease. Primary liver cancer is a digestive system tumor with very high malignancy, and the five-year survival rate does not exceed 30%. Because primary liver cancer is prone to intrahepatic dissemination through the portal vein, it is prone to recurrence even when small liver cancers are radically removed by surgery. Metastatic hepatocellular carcinoma is usually a late-stage lesion, but some metastatic hepatocellular carcinoma can be resected together with the primary lesion at the same time to achieve a better survival, but the overall prognosis is poor.2. If the occupying hepatic lesion is benign, such as hepatic hemangioma or hepatic adenoma, sometimes clinical treatment is not necessary and regular follow-up observation is sufficient, which will not affect the patient’s survival or quality of life. However, if the lesions are very large in diameter or very numerous, such as multiple hepatic cysts and hepatic hemangiomas, they may also cause severe clinical symptoms and even cause hemorrhagic shock, cirrhosis, liver failure, and eventually lead to the death of the patient.