Solid nodules in the liver are most commonly tumors or solid occupying lesions. Specifically, they are divided into benign and malignant tumors, and benign tumors are less likely because the most common benign lesions are hepatic cysts or hemangiomas, which are mostly visible as intact envelopes, and are slow to develop with contrast on enhanced CT. Malignant tumors include primary and secondary hepatocellular carcinoma. The most common cause of primary hepatocellular carcinoma is that middle-aged and elderly male patients drink alcohol for years and have a history of alcoholic cirrhosis, which leads to secondary hepatocellular carcinoma. There are also some cases of chronic viral hepatitis which is repeatedly untreated and aggravated, and also develop cirrhosis or liver cancer, in which case surgery can be chosen as an early treatment. For metastatic hepatocellular carcinoma, most commonly malignant tumors originating from the colon, intravenous chemotherapy or radiofrequency ablation can be performed.