Abstract: Objective To analyze the curative effects of Da Vinci robot-assisted thoracoscopic surgery for 99 cases with mediastinal tumor in children and summarize the experience.Methods The clinical date of 99 cases of robot-assisted mediastinal mass in Wuhan Children's Hospital from December 2020 to December 2023 were retrospectively analyzed.Tumor type,size,incision selection,operation time,intraoperative blood loss,postoperative complications and follow-up were summarized and analyzed.Results  All the operations were successfully completed without perioperative death and 3 cases were converted to thoracotomy.The duration was (86.5±21.7) min,the intraoperative blood loss was (8.5±1.6) ml,and the postoperative hospital stay was (7.4±3.2) d.The postoperative complications included chylothorax (n=4),Horner's syndrome (n=3) ,and 1 case of tracheal injury.During the follow-up of 1 year,1 case of poorly differentiated neuroblastoma recurred and underwent second operation 6 months later.The other children recovered well without death.Conclusion Da Vinci robot-assisted mediastinal tumor resection surgery in children is safe and feasible.Preoperative surgical plans should be fully prepared,and the conversion to thoracotomy should be timely and decisive.

Key words: mediastinal tumors in children, robots, thoracoscopy, minimally invasive surgery