Hypoechoic mass in the right lobe of the liver is a description of a space-occupying lesion in the right lobe of the liver during abdominal ultrasound examination, which may be caused by liver cysts, hepatic hemangiomas, liver cancer and so on. 1. Hepatic cysts: Hepatic cysts are usually caused by congenital developmental abnormalities or bile excretion obstruction, which can be characterized as hypoechoic mass in the right lobe of the liver during ultrasound examination. 2. Hepatic hemangioma: Hepatic hemangioma is usually caused by abnormal development of blood vessels in the liver, and it can also be manifested as hypoechoic mass in ultrasound. 3. Hepatocellular carcinoma: when hepatocellular carcinoma occurs in the right lobe of the liver, the cancer cells grow in the right lobe of the liver to form a mass in the right lobe of the liver, which can be manifested as hypoechoic mass in the right lobe of the liver on imaging. Hypoechoic mass in the right lobe of the liver may also be caused by liver metastases and other benign liver nodules. Patients should go to the hospital in time to improve the examination and give targeted treatment after clarifying the cause of the disease.