title: Retroperitoneoscopic assisted single-site pyeloplasty using EZ access in children: Comparison with open dismembered pyeloplasty.
abstract: OBJECTIVE
  The aim of this study was to compare the results of the retroperitoneoscopic assisted pyeloplasty (RASP) using EZ access (silicone rubber cap) with open dismembered pyeloplasty (ODP) in children.
  
  
  METHODS
  A retrospective review was performed of patients treated for ureteropelvic junction (UPJ) obstruction with either RASP or ODP from 2010 to 2015. For patients with RASP, two 5-mm trocars were placed in the EZ access. The UPJ was dissected retroperitoneoscopically and dismembered pyeloplasty was performed extracorporeally. Patient demographics and operative outcomes were compared between the groups.
  
  
  RESULTS
  A total of 50 children were included, with 25 RASP and 25 ODP. Mean patient age was 49months in the RASP group and 53months in the ODP group. Perioperative outcomes, including operative time (185 vs 188min) and postoperative hospital stay (2.0 vs 2.2days), were similar between the two groups. Mean skin scar length (17 vs 34mm) was significantly smaller in the RASP group. The postoperative success rate (96% vs 100%) was not significantly different between the groups.
  
  
  CONCLUSIONS
  The RASP represents a safe and effective single-site procedure in children. This procedure significantly reduces the skin scar length and has equivalent surgical outcomes to ODP.
  
  
  METHODS
  Retrospective comparative study.
  
  
  METHODS
  III.
authors.affiliation: Department of Urology, Kanagawa Children's Medical Center, 2-138-4 Mutsukawa, Minami-ku, Yokohama 232-8555, Japan. Electronic address: yuichiroy@gmail.com.
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Yamazaki
authors.affiliation: Department of Urology, Kanagawa Children's Medical Center, 2-138-4 Mutsukawa, Minami-ku, Yokohama 232-8555, Japan.
authors.forename: Woo Jin
authors.initials: WJ
authors.lastname: Kim
authors.affiliation: Department of Urology, Kanagawa Children's Medical Center, 2-138-4 Mutsukawa, Minami-ku, Yokohama 232-8555, Japan.
authors.forename: Sayaka
authors.initials: S
authors.lastname: Akiyama
authors.affiliation: Department of Urology, Kanagawa Children's Medical Center, 2-138-4 Mutsukawa, Minami-ku, Yokohama 232-8555, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ikeda
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002921:Cicatrix / Q000209:etiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007682:Kidney Pelvis / Q000601:surgery*; D010535:Laparoscopy / Q000295:instrumentation / Q000379:methods*; D008297:Male; D012189:Retrospective Studies; D012826:Silicone Elastomers; D016896:Treatment Outcome; D014513:Ureter / Q000601:surgery*; D014517:Ureteral Obstruction / Q000601:surgery*; D013520:Urologic Surgical Procedures / Q000295:instrumentation / Q000379:methods*
chemical_list: D012826:Silicone Elastomers
keywords: Hydronephrosis; Kidney pelvis; Laparoscopy; Pelviureteric junction obstruction; Urologic surgical procedures