title: [Three-dimensional versus two-dimensional imaging systems in laparoscopic radical prostatectomy for prostate cancer: a retrospective cohort study].
abstract: OBJECTIVE
  To compare the perioperative, functional and oncologic outcomes of patients with prostate cancer receiving laparoscopic radical prostatectomy (LRP) using three-dimensional (3D) versus two-dimensional (2D) imaging systems.
  
  
  METHODS
  From February, 2014 to January 2016, 72 consecutive patients with clinically localized prostate cancer underwent LRP with 2D or 3D imaging systems performed by a single experienced surgeon. The baseline characteristics, perioperative data, and functional and oncologic outcomes of the patients were collected and analyzed.
  
  
  RESULTS
  Thirty-six patients underwent 3D LRP and the other 36 patients underwent 2D LRP. Compared with 2D LRP group, 3D LRP group had a significantly shorter operative time (167 vs 218 min, P<0.001), a smaller volume of intraoperative blood loss (86.11 vs 177.78 mL, P<0.001) and a better early urinary continence outcome (88.89% vs 63.89%, P=0.026). No significant differences were found between the two groups in terms of complications, potency outcome or biochemical recurrence-free rate.
  
  
  CONCLUSIONS
  Compared with 2D LRP, 3D LRP shortens the operative time, reduces intraoperative blood loss and is associated with a better early urinary continence outcome in patients with clinically localized prostate cancer.
authors.affiliation: Department of Urology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.E-mail: 916225683@qq.com.
authors.forename: Kai-Qiang
authors.initials: KQ
authors.lastname: Tang
authors.forename: Shi-Yu
authors.initials: SY
authors.lastname: Pang
authors.forename: Ji-Ming
authors.initials: JM
authors.lastname: Bao
authors.forename: Cheng-Yong
authors.initials: CY
authors.lastname: Lei
authors.forename: Wan-Long
authors.initials: WL
authors.lastname: Tan
mesh_terms: D006801:Humans; D021621:Imaging, Three-Dimensional / Q000706:statistics & numerical data; D010535:Laparoscopy / Q000379:methods*; D008297:Male; D011468:Prostatectomy / Q000379:methods*; D011471:Prostatic Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery*; D012189:Retrospective Studies; D016896:Treatment Outcome