title: Wilms tumor: a retrospective study of 32 patients using videolaparoscopic and open approaches.
abstract: OBJECTIVE
  To compare videolaparoscopic nephrectomy and the open technique as treatments for Wilms tumor, specifically the surgical results, immediate and long-term complications, and patient survival.
  
  
  METHODS
  A review of charts of children with unilateral Wilms tumor was performed. There were 2 surgical groups: (1) only open surgery and (2) videolaparoscopy. Complications, transfusion, ruptures, margins, conversions, lymph nodes, and relapse were analyzed.
  
  
  RESULTS
  Seventeen children underwent laparoscopic nephrectomy and 15 underwent open nephrectomy. Mean surgical time was 164.71±26.07 minutes for the laparoscopic group, and there were no conversions or ruptures. The mean specimen weight was 145.01±105.85 g for the laparoscopic group and 257.40±162.70 g for the open surgery group. There was 1 preoperative rupture in the open surgery group. Transfusions were not required in either group. The surgical margins were positive in 1 of 17 cases (5.9%) in the laparoscopic group and in 3 of 15 cases (20%) in the open surgery group. One of the 17 (5.9%) laparoscopy-treated patients and 2 of the 15 open surgery-treated patients (13.3%) presented with local tumor relapse. The 5-year event-free survival rate was 93.3% (95% confidence interval, 0.61-0.99) for the laparoscopic group and 79.6% (95% confidence interval, 0.37-0.95] for the open surgery group (P=.446).
  
  
  CONCLUSIONS
  Both techniques showed similar immediate and long-term results.
authors.affiliation: Department of Urology, University of São Paulo Medical School, São Paulo, Brazil. Electronic address: ricjordao@uol.com.br.
authors.forename: Ricardo Jordão
authors.initials: RJ
authors.lastname: Duarte
authors.affiliation: Department of Pediatric Oncology, University of São Paulo Medical School, São Paulo, Brazil.
authors.forename: Lilian Maria
authors.initials: LM
authors.lastname: Cristofani
authors.affiliation: Department of Urology, University of São Paulo Medical School, São Paulo, Brazil.
authors.forename: Francisco Tibor
authors.initials: FT
authors.lastname: Dénes
authors.affiliation: Department of Pediatric Oncology, University of São Paulo Medical School, São Paulo, Brazil.
authors.forename: Vicente Odone
authors.initials: VO
authors.lastname: Filho
authors.affiliation: Department of Pediatric Surgery, University of São Paulo Medical School, São Paulo, Brazil.
authors.forename: Uenis
authors.initials: U
authors.lastname: Tannuri
authors.affiliation: Department of Urology, University of São Paulo Medical School, São Paulo, Brazil.
authors.forename: Miguel
authors.initials: M
authors.lastname: Srougi
mesh_terms: D000328:Adult; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000401:mortality / Q000601:surgery*; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009392:Nephrectomy / Q000009:adverse effects / Q000379:methods*; D011183:Postoperative Complications / Q000453:epidemiology / Q000209:etiology; D012189:Retrospective Studies; D015996:Survival Rate; D020535:Video-Assisted Surgery; D009396:Wilms Tumor / Q000401:mortality / Q000601:surgery*