1, Liver cysts can probably be divided into non-parasitic and parasitic cysts. Liver cysts are usually benign single or multiple, and single large cysts are very rare. Hepatic cysts (non-parasitic) are common benign tumors, with retention cysts and congenital multicystic liver being the most common. Solitary liver cysts can occur at any age, are more common in women, and are often located in the right lobe of the liver. Multiple liver cysts, which are more common than solitary ones, can invade the left and right liver lobes, and about 50% of multiple liver cysts can be combined with polycystic kidney. 2, liver cysts pathogenesis, generally considered to have the following possibilities: retention liver cysts: for a bile duct in the liver due to inflammation, edema, scarring or stone obstruction caused by increased secretion, or bile retention caused by, mostly single, but also due to blunt contusion of the liver, to the center of the late rupture. The lesioned cyst is filled with blood or bile, and the envelope is fibrous tissue, and it is a solitary pseudocyst. Congenital hepatic cysts: due to developmental disorders of intrahepatic bile ducts and lymphatic ducts in embryo or cholangitis in fetus, small intrahepatic bile ducts are occluded, proximal end is cystic enlargement and intrahepatic bile ducts are degenerated and locally proliferated and blocked, mostly multiple. It is often accompanied by multicystic changes of kidney or other organs. 3, liver cysts clinical manifestations: liver cysts early asymptomatic, clinical diagnosis is difficult, in recent years, mostly found by ultrasound examination. The cyst grows slowly, and when the cyst grows to a certain extent and presses the neighboring organs, symptoms such as fullness after eating, poor appetite, nausea, vomiting, abdominal discomfort and pain may appear. Obstructive jaundice caused by compression of bile ducts is less common. In a few cases, cyst rupture, intracapsular hemorrhage, and torsion of cysts with tissues may cause acute abdomen. In case of intracystic infection, there are chills, fever and elevated white blood cells, and on physical examination, there may be a large liver or epigastric mass. 4.Hepatic cyst treatment: single or multiple cysts without clinical symptoms should be observed by regular ultrasound examination, and cysts over 5 cm in size can be treated by injecting sclerosing agent after aspiration of cyst fluid under ultrasound guidance. For huge or limited cysts with secondary infection, surgical treatment is often required, and the liver area should be avoided to be collided by external force in general to avoid cyst rupture.