Based on his expertise in laparoscopic retroperitoneal adrenalectomy, Dr. Lee was asked to share his technique for this procedure at the American College of Surgeons Clinical Congress 2011. The ACS Clinical Congress presents the latest therapies for surgical diseases. Laparoscopic retroperitoneal adrenalectomy has been shown to be an effective replacement for open adrenalectomy for resection of most adrenal tumors. October 2011.