title: Transumbilical Single-Site Multiport Laparoscopic Pyeloplasty for Children with Ureteropelvic Junction Obstruction in China: A Multicenter Study.
abstract: BACKGROUND
  Transumbilical single-site multiport laparoscopic pyeloplasty (TSMLP) for children with ureteropelvic junction obstruction (UPJO) has become feasible and popular recently. The purpose of this study was to evaluate the safety and efficacy of TSMLP for pediatric UPJO in a large multicenter series.
  
  
  METHODS
  Medical records of consecutive patients who underwent TSMLP for pediatric UPJO in six academic institutions between June 2010 and May 2015 were retrospectively analyzed. The data of ultrasound, magnetic resonance urography, and diuretic renogram using 99Tc-diethylene triamine pentaacetic acid scan were collected during preoperative and postoperative periods.
  
  
  RESULTS
  A total of 704 patients (750 kidneys) with UPJO who underwent TSMLP were recruited for this study. Of these patients, there were no significant differences in demographics and clinical presentation of the patients among the six centers. The operative time of all patients decreased significantly with time. The earlier the beginning of the operation, such as cohort A, B, and C, the longer the learning curve has been. Of these 704 patients, there were 60 (8.11%) postoperative minor complications during the postoperative hospitalization period, and all minor postoperative complications were cured by observation or drugs. There were 14 (1.99%) major postoperative complications, and all major complications were cured by minimally invasive surgery. No additional complications were encountered during the follow-up of 2.1 years (mean, ranged 1 year to 4 years). Success rate of TSMLP are more than 95% among six centers.
  
  
  CONCLUSIONS
  We reported a multi-institutional series of TSMLP in children with UPJO. Our findings suggest that TSMLP represents a feasible treatment option for UPJO by offering reliable outcomes, low postoperative complications and high success rates.
authors.affiliation: 1 Department of Pediatric Urology, Bayi Children's Hospital, Affiliated to Chinese PLA Army General Hospital , Beijing, People's Republic of China .
authors.forename: Dehong
authors.initials: D
authors.lastname: Liu
authors.affiliation: 1 Department of Pediatric Urology, Bayi Children's Hospital, Affiliated to Chinese PLA Army General Hospital , Beijing, People's Republic of China .
authors.forename: Huixia
authors.initials: H
authors.lastname: Zhou
authors.affiliation: 2 Department of Pediatric Urology, Anhui Provincial Children's Hospital , Hefei, People's Republic of China .
authors.forename: Min
authors.initials: M
authors.lastname: Chao
authors.affiliation: 3 Department of Urology, The Second Hospital of Hebei Medical University , Shijiazhuang, People's Republic of China .
authors.forename: Jinchun
authors.initials: J
authors.lastname: Qi
authors.affiliation: 4 Department of Urology, The People's Hospital of Guangxi Zhuang Autonomous Region , Nanning, People's Republic of China .
authors.forename: Huayu
authors.initials: H
authors.lastname: Wei
authors.affiliation: 5 Department of Pediatric Surgery, Guizhou Provincial People's Hospital , Guiyang, People's Republic of China .
authors.forename: Nini
authors.initials: N
authors.lastname: An
authors.affiliation: 6 Department of Pediatric Urology, Hubei Provincial Maternal and Child Healthcare Hospital , Wuhan, People's Republic of China .
authors.forename: Haitao
authors.initials: H
authors.lastname: Chen
authors.affiliation: 7 Department of Pediatric Surgery, The Capital Institute of Pediatrics , Beijing, People's Republic of China .
authors.forename: Long
authors.initials: L
authors.lastname: Li
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002681:China; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007223:Infant; D007682:Kidney Pelvis / Q000601:surgery*; D010535:Laparoscopy / Q000379:methods; D008297:Male; D008499:Medical Records; D019060:Minimally Invasive Surgical Procedures / Q000379:methods; D061646:Operative Time; D011183:Postoperative Complications; D012189:Retrospective Studies; D013525:Surgical Instruments; D016896:Treatment Outcome; D014517:Ureteral Obstruction / Q000601:surgery*; D013520:Urologic Surgical Procedures / Q000379:methods
keywords: children; multicenter study; multiport; pyeloplasty; transumbilical laparoscopy; ureteropelvic junction obstruction