Indications: 1, diameter > 5cm single or multiple cysts 2, cysts cause obvious clinical symptoms, such as liver, pancreatic, splenic cysts, abdominal discomfort, abdominal distension or abdominal pain; renal cysts hematuria or lumbar and back pain, pelvic non-congestive cysts appearing menstrual cramps or menstrual disorders Wang Jianxiong, ultrasound department, Nankai Hospital, Tianjin City, China 3, compression of the surrounding organs caused by secondary comorbidity, 4, cysts combined with infection, 5, rupture risk or torsion Danger or torsion of cysts Contraindications: 1, severe bleeding tendency, bleeding, coagulation mechanism disorders 2, no safe puncture path 3, can not exclude aneurysms or hemangiomas of cystic lesions 4, cysts and bile ducts, renal pelvis, pancreatic ducts want to communicate 5, polycystic liver, polycystic kidney, unless the larger cysts compression of the surrounding organs due to comorbidities, generally do not do sclerotherapy 6, allergic to alcohol 7, the combination of other serious diseases, the combination of other serious illnesses. The patient’s general condition is poor, or suffering from serious heart or lung disease, highly nervous and uncooperative people, and those who need to breathe with the treatment and the patient is difficult to cooperate Special Treatment Informed Consent Proposed ultrasound-guided liver cyst puncture and fluid extraction for sclerotherapy, which may be: 1. Liver bleeding 2. Abdominal cavity infection 3. Thoracic cavity infection 4. Infection in the cysts 5. Drunkenness-like reaction 6. Pain 7. Fever 8. Repeated treatments are likely to occur 9. The Treatment (part) is not covered by health insurance reimbursement Technical points: 1, preoperative fasting 8-12 hours, abdominal distension is obvious, should be cleaned and enema beforehand 2, the amount of alcohol injected into the cystic fluid volume of 1/5-1/2, 1/4 is better, generally not more than 50ml 3, the maximum amount of alcohol retained in the capsule is not more than 20 ml 4, when performing sclerotherapy of renal cyst, the first tube of the cystic fluid should be done first for the qualitative test of proteins 5, Do not allow air to enter the cystic cavity during suction and drug injection; before injecting sclerosing agent and pulling out the puncture needle, a small amount of lidocaine can be injected in order to reduce the pain caused by sclerosing agent stimulating the wall of the cyst or sclerosing agent overflowing along the needle channel. 6.When the cyst sclerotherapy needs to be repeated, it should be done every 2~3 days. 7.After sclerotherapy, the cyst may reappear or increase in size in the first two weeks, mainly due to aseptic inflammatory response to exudate, generally 3-6 months after the inflammatory exudate is completely absorbed before it disappears, and no shrinkage can be considered ineffective after 6 months.