In our daily life, we often hear people say that they have found cysts on their liver, and some people will take it as a tumor, but is it a real tumor and is there any good treatment for it? Today I will give you a detailed answer. First of all, it should be clear that liver cyst is not really a tumor, and it is generally divided into two categories, parasitic and non-parasitic, according to the different mechanisms of its occurrence. Non-parasitic congenital liver cysts, which are more common in clinical practice, are the focus of our discussion today. Congenital liver cysts are classified according to their number into solitary liver cysts and multiple liver cysts, the latter being also known as polycystic liver. Congenital hepatic cysts are actually congenital bile duct malformations, which are developmental abnormalities. The cyst is usually a closed lumen consisting of a single layer of cuboidal or columnar arrangement of epithelial cells that does not communicate with the intrahepatic bile duct system. The cystic fluid contained within the cyst consists of water and electrolytes and does not contain bile acids or bilirubin, which is close to the normal secretion of bile duct epithelial cells. What kind of symptoms can liver cysts have? Liver cysts can be asymptomatic for a long time or for life because of slow growth, and are often found by chance during ultrasound examination. The main clinical manifestations vary with the location, size, number of cysts, the presence or absence of compression of adjacent organs and the presence or absence of complications. The more common clinical symptoms and signs are as follows: 1. Gastrointestinal symptoms: when the cyst increases and compresses the stomach, duodenum and colon, it can cause symptoms such as postprandial fullness, loss of appetite, nausea and vomiting. 2, abdominal pain: large and heavy cysts can cause epigastric swelling discomfort, vague pain or mild dull pain. Sudden onset of severe pain or signs and symptoms of peritonitis suggest the occurrence of complications such as cyst bleeding or rupture, and chills and fever may appear. 3, abdominal mass: the discovery of abdominal mass is the main initial manifestation in many patients. 4.Jaundice: less common, cysts adjacent to the hepatic hilum compressing the hepatic duct or common bile duct can cause mild jaundice, the incidence of which is low and only occurs in about 5% of cases. By what methods can liver cysts be detected early? B-mode ultrasound is the most commonly used test, and it has the advantages of high sensitivity, non-invasive, simple and easy to perform, and it can easily detect cysts <25px with an accuracy rate of 98%. The sonogram of liver cyst shows a round or oval liquid dark area in the liver, with thin cyst wall, neat and smooth edges, and clear boundary with surrounding tissues, posterior cyst wall and deep tissue echogenicity enhancement, and the wall is often accompanied by refractive sound shadow. In addition to ultrasound, CT scan is also a good examination method to detect liver cysts. ct examination can accurately show the location, size, scope and nature of liver cysts, with a 98% confirmation rate. ct film shows liver cysts as well-defined, uniformly dense, round or elliptical low-density areas, with no enhancement inside the cysts after intravenous contrast injection. How to treat liver cysts? The treatment of liver cysts depends on their size, nature and the presence of complications. Those with a diameter of 125 px and symptoms of compression can be treated with ultrasound-guided puncture and fluid aspiration to relieve the compression symptoms. After aspiration, anhydrous alcohol is then injected into the cyst cavity for chemical ablation to destroy the epithelial cells of the cyst wall and prevent recurrence of the cyst. This method is easy to operate, does not require dissection, is less traumatic, and has clear effects, and is now gradually becoming the preferred method for the treatment of liver cysts. External drainage is appropriate when there is infection in the cyst. When there are complications such as cyst rupture, cystic torsion, intracapsular hemorrhage or huge cyst compressing adjacent organs affecting food, surgical treatment is needed. If bile enters the cystic cavity, the latter procedure is not applicable and cyst-jejunostomy can be performed. Intraoperative imaging should be performed to determine the presence or absence of traffic, and if the cyst is multifocal, its separation should be removed as much as possible before drainage. Pathological examination of the cyst wall should be done carefully to exclude malignant changes.