The patient, Ms. Luo, was found to have a spleen cyst of about 6.8×4.5×4.0 cm in size on physical examination 1 year ago, but at that time the patient did not feel discomfort and did not undergo treatment. In the past two months, she felt distension in her left upper abdomen, and a few days ago, she had a repeat ultrasound and found that the spleen cyst had grown to 18×10×5.0cm in size. Three days later, Ms. Luo underwent a laparoscopic splenectomy and was discharged from the hospital five days after the surgery. Splenectomy is a common procedure for the treatment of splenic trauma, splenic tumors, portal hypertension, schistosomiasis, and hematologic disorders. Traditional surgery to remove the spleen has the disadvantages of difficult exposure, long surgical incision, trauma, bleeding, complications, slow postoperative recovery and patient pain. With the development of laparoscopic techniques, many physicians abroad have attempted to remove the spleen using laparoscopic techniques. 1991, Delaitre first reported laparoscopic splenectomy for thrombocytopenic purpura. ”Laparoscopic splenectomy is one of the most difficult procedures in laparoscopic surgery and requires the surgeon to be skilled in laparoscopic techniques. The basic method of laparoscopic splenectomy is to place a laparoscope in the umbilicus, create a CO2 pneumoperitoneum, and then make three small incisions in the abdominal wall to insert instruments for the operation. The ligaments surrounding the spleen are usually freed first with an ultrasonic knife and finally the splenic vessels are dissected with a linear cutting anastomosis. The excised spleen is placed in a specimen bag, hand-assisted or shredded and removed through an enlarged incision in the umbilicus. Minimally invasive laparoscopic surgery overcomes the shortcomings of open surgery and has the advantages of less trauma, better cosmetic results, fewer wound complications, less impact on the patient’s immune function, faster recovery and less pain for the patient after surgery, early activity on the floor, and shorter hospital stay. Laparoscopic splenectomy is mainly used for the treatment of (1) hematologic disorders such as hereditary spherocytosis, primary thrombocytopenic purpura (ITP), hereditary elliptocytosis, Hodgkin’s disease, β-thalassemia, etc. (2) Benign occupying lesions of the spleen. Such as splenic malformation tumor, splenic giant or multiple cysts, etc. (3) Splenic trauma. For patients with abdominal trauma, splenectomy is feasible if the splenic rupture is comminuted by laparoscopic investigation and the spleen cannot be preserved. The spleens of hematologic diseases and benign tumors are mostly of normal size, and skilled laparoscopic surgeons have no difficulty in removing these spleens. In portal hypertension and schistosomal cirrhosis, the spleen is huge and bleeding is high and risky for removal by conventional laparoscopic techniques. In these cases, the spleen can be removed using a hand-assisted technique, also known as HALS (hand-assisted laparoscopic splenectomy). The basic approach is to make an incision of about 7 cm in the abdomen and place a hand-assisted device (a device to prevent air leakage, usually LapaDisk), through which the operator places the non-dominant hand (usually the left hand) into the abdominal cavity to assist in the procedure. With the help of this hand, the safety of the operation is greatly improved and the operation time is significantly reduced.