To determine whether multiple metastases in the liver are hepatocellular carcinoma, first understand the definition of multiple metastases in the liver. Benign tumors do not metastasize, for example, polyps, cysts, hemangiomas and other benign tumors do not metastasize because metastasis can only be used to describe cancer or malignancy. Multiple metastases in the liver arise from other tumors, such as colon, sigmoid, rectal, gastric, adenocarcinoma, hepatocellular carcinoma, and other primary tumors, and the most important characteristic is metastasis. The cancer cells of primary tumors are similar to seeds. If the cancer cells of primary tumors metastasize to the liver, they can stay in the liver, grow, multiply, and finally generate hepatocellular carcinoma, and multiple metastases are often not primary tumors, so the definition of multiple metastases in the liver is actually different from primary liver cancer.