Shadows on the liver are usually liver cysts and hemangiomas or primary liver cancer. 1. Liver cysts and hemangiomas: if shadows are found on the liver after ultrasound or CT examination, it usually suggests that there are space-occupying lesions on the liver. If the lesions are benign, they may be cysts and hemangiomas, which should be clarified by enhanced CT examination to determine the nature of the lesions and then dealt with. 2. Primary hepatocellular carcinoma: If the shadow on the liver is malignant, primary hepatocellular carcinoma, that is, malignant tumors originated from the liver, is the most common in the clinic. In order to make a clear diagnosis, more perfect examinations, such as enhanced CT, nuclear magnetic resonance imaging and liver biopsy, are needed. If there is a shadow on the liver, it is important to visit the hospital for further examination and then follow up treatment according to the situation.