The onset and clinical manifestations of hepatic and renal cysts Hepatic cysts are a common liver lesion, divided into true hepatic cysts (congenital) and pseudocysts (inflammation, trauma, parasites). Congenital is the most common, can be single or multiple, single is more common, female is more common, the ratio of male to female is about 1:4, women aged 20-25 years old are more often affected, often occurring in the right lobe of the liver. The amount of fluid in the cyst can be up to 1000 ml in large cysts, but only a few ml in small ones, and the fluid inside the cyst can be transparent or contain bile or have bleeding. Congenital liver cysts grow slowly and can be asymptomatic for a long time. Only when the cyst increases and presses on the surrounding organs, symptoms such as abdominal distension, nausea and right upper abdominal discomfort can appear. When the cyst bleeds, it can cause pain, and if it is complicated by infection, fever and other symptoms can appear. Multiple cysts, also known as polycystic liver, are mostly combined with polycystic kidney and are more common in women aged 40-60. When combined with bile duct stenosis, it often leads to cholecystitis and may cause symptoms such as fever and jaundice. No matter single or multiple liver cysts, as long as they are asymptomatic, have normal liver function and do not affect work, they can be reviewed regularly, do not be nervous and do not need treatment. When the cysts are larger than 10 cm, symptoms will appear and treatment is needed. Kidney cyst is a common cystic lesion of kidney, there are multiple cysts and simple, multiple kidney cyst is related to heredity. Multiple renal cysts can be as small as 0.1 cm in diameter and as large as thousands of milliliters of fluid, with more than a hundred cysts, often occurring simultaneously with liver cysts. The onset of the disease increases with age, and symptoms mostly appear after the age of 40. Common symptoms include epigastric discomfort and lumbar pain, 10% have hematuria, 20% have palpable masses in the abdomen, 58% have hypertension, and multiple silent dark areas of varying size are visible under ultrasound. Simple renal cysts are congenital and the most common. Most of those found on physical examination are of this type. Those with cysts under 3 cm rarely have symptoms, while those with large cysts may have back pain, urinary frequency, and urinary urgency. ct scan is the most accurate to identify liver and kidney cysts from tumors. The density of cyst fluid approximates to water, while the density of tumor is similar to normal kidney parenchyma. After intravenous contrast injection, the renal parenchyma becomes denser while the cyst remains unaffected; the cyst wall is clearly demarcated from the renal parenchyma while the tumor is not; the cyst wall is thin while the tumor is not. In many ways, differentiating between cysts and tumors CT is superior to puncture aspiration judgment. Ultrasonography accounts for a large proportion of the non-invasive diagnostic techniques taken to identify liver and kidney cysts from parenchymal masses. When ultrasonography reveals an image consistent with a cyst, the cyst can be punctured and the fluid aspirated under ultrasound image surveillance. Treatment of liver cysts and kidney cysts can be followed up without treatment as long as there are no symptoms, if the liver cyst is less than 5 cm and the kidney cyst is less than 3 cm, liver function and urine laboratory tests are normal; kidney function is normal. However, when the cyst increases to compress the liver and kidney parenchyma may trigger liver and kidney atrophy and affect the liver and kidney function, then treatment is necessary. At present, the treatment methods: surgical cystectomy and interventional treatment are available. The former is effective and does not recur, but it is traumatic, costly and slow to recover. Interventional treatment is imaging-guided cyst puncture and aspiration, followed by injection of equal amount of anhydrous alcohol to destroy the cyst wall tissue and make the cyst cavity closed and healed. This method is simple, painless, without any scars left after the operation; and the cost is low and the recovery is fast. If treated properly, the technical method is advanced and in place, it is generally not easy to recur. At present, minimally invasive interventional treatment is popular internationally, so it is widely welcomed and respected by both doctors and patients.