Hypodense shadow in the left lobe of the liver indicates that the patient has an abnormal mass on the left side of the liver, which is less dense than normal liver tissue under CT, and may be caused by liver cysts, hepatic hemangiomas, liver cancer and other diseases, and the specific cause of the disease cannot be determined by this result. Hypodense shadow in the left lobe of the liver is an imaging manifestation indicating that an abnormal mass on the left side of the patient’s liver with lower density than normal liver tissue is detected during the imaging examination, which may be caused by diseases such as fatty liver, hepatic hemangioma, hepatic cysts, liver cancer, etc. The exact cause of the disease cannot be determined by this result. The cause of the disease cannot be confirmed by this finding, and the patient can undergo further ultrasonography, enhanced CT, and other tests. It is recommended that patients with hypodense shadows in the left lobe of the liver undergo further tests as prescribed by the doctor to clarify the cause of the disease and then standardize the treatment to address the cause.