Abstract: Objective To investigate the safety and clinical efficacy of laparoscopic partial nephrectomy in the treatment of localized renal pelvic neck atresia.
Methods From June 2016 to December 2018，12 patients with localized severe hydronephrosis due to upper cervical sacral atresia were treated in Wuhan University Renmin Hospital.All patients underwent laparoscopic partial nephrectomy.The operation time and intraoperative bleeding，intraoperative warm ischemia time，postoperative hospital stay，intraoperative and postoperative complications and follow-up were counted.
Results All the 12 cases were successful，the average operation time was 112.6min，and the average warm ischemia time was 28.6min.The mean hemoglobin decline during surgery decreased by 5.7g/L，and the average postoperative hospital stay was 7.6 days.No obvious complications were found during or after operation.A total of 10 patients underwent ECT examination with renal function at 6 months after operation，with an average GFR of 29.4ml/min.
Conclusion Laparoscopic partial nephrectomy is safe and effective in the treatment of severe upper hydronephrosis caused by renal sacral atresia in the upper group.

Key words: laparoscopic; , partial nephrectomy; , upper group renal pelvis; , calyx cervical atresia; , warm ischemia time