The patient was found to have a retroperitoneal tumor on CT examination due to discomfort in the upper and middle abdomen, and the lesion was located between the pancreas, left kidney, spleen, stomach and left diaphragm, which made the surgery difficult, and a large medical center in the north refused to perform laparoscopic surgery, and the patient traveled a long way to get here, and the tumor resection was successfully completed laparoscopically at this particular site this afternoon after the joint efforts of the medical team, and there was bleeding of about 30 ml during the operation. thanks to the team’s efforts! Thanks to the team’s efforts!