title: Laparoscopic resection of retroperitoneal benign neurilemmoma.
abstract: OBJECTIVE
  The aim of this study was to verify that laparoscopic resection for treating retroperitoneal benign neurilemmoma (NL) is expected to be favorable for complete resection of tumor with technical feasibility and safety.
  
  
  METHODS
  We retrospectively analyzed 47 operations for retroperitoneal neurogenic tumor at Yonsei University College of Medicine, Severance Hospital and Gangnam Severance Hospital between January 2005 and September 2015. After excluding 21 patients, the remaining 26 were divided into 2 groups: those who underwent open surgery (OS) and those who underwent laparoscopic surgery (LS). We compared clinicopathological features between the 2 groups.
  
  
  RESULTS
  There was no significant difference in operation time, estimated blood loss, transfusion, complication, recurrence, or follow-up period between 2 groups. Postoperative hospital stay was significantly shorter in the LS group versus the OS group (OSvs. LS, 7.00 ± 3.43 daysvs. 4.50 ± 2.16 days; P = 0.031).
  
  
  CONCLUSIONS
  We suggest that laparoscopic resection of retroperitoneal benign NL is feasible and safe by obtaining complete resection of the tumor. LS for treating retroperitoneal benign NL could be useful with appropriate laparoscopic technique and proper patient selection.
authors.affiliation: Department of Surgery, Yonsei University College of Medicine, Seoul, Korea.
authors.forename: Jung Hwan
authors.initials: JH
authors.lastname: Ji
authors.affiliation: Gangnam Severance Hospital, Seoul, Korea.
authors.forename: Joon Seong
authors.initials: JS
authors.lastname: Park
authors.affiliation: Department of Surgery, Yonsei University College of Medicine, Seoul, Korea.; Pancreaticobiliary Cancer Clinic, Yonsei Cancer Center, Institute of Gastroenterology Severance Hospital, Seoul, Korea.
authors.forename: Chang Moo
authors.initials: CM
authors.lastname: Kang
authors.affiliation: Gangnam Severance Hospital, Seoul, Korea.
authors.forename: Dong Sup
authors.initials: DS
authors.lastname: Yoon
authors.affiliation: Department of Surgery, Yonsei University College of Medicine, Seoul, Korea.; Pancreaticobiliary Cancer Clinic, Yonsei Cancer Center, Institute of Gastroenterology Severance Hospital, Seoul, Korea.
authors.forename: Woo Jung
authors.initials: WJ
authors.lastname: Lee
keywords: Laparoscopy; Neurilemmoma; Retroperitoneal neoplasms