Liver cyst is a relatively common disease of the liver. Usually the following tests are mostly performed: 1. Ultrasound: It is a highly sensitive and non-invasive method for diagnosing liver cysts and is the preferred method. It can determine the nature, location, size and number of cysts with high accuracy; 2. CT examination: it can accurately show the location, size, nature and scope of cysts with high confirmation rate; 3. X-ray examination: the performance can be different depending on the size and location of cysts, and there can be enlarged liver, elevated diaphragm and displaced intestines; 4. MRI examination: it can be seen that liver cysts are round with clear edges and avascular areas, and their The surrounding blood vessels are pushed and bowed; 5. Laparoscopy: laparoscopy is valuable for the diagnosis of superficial simple cysts and can guide puncture and fluid extraction; 6. Nuclear scan: it helps to localize and diagnose liver cysts, but it is difficult to differentiate them from liver abscess and liver cancer, and is rarely used in clinical practice.