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  • Title: Robotic assisted laparoscopic prostatectomy versus radical retropubic prostatectomy for clinically localized prostate cancer: comparison of short-term biochemical recurrence-free survival.
    Author: Barocas DA, Salem S, Kordan Y, Herrell SD, Chang SS, Clark PE, Davis R, Baumgartner R, Phillips S, Cookson MS, Smith JA.
    Journal: J Urol; 2010 Mar; 183(3):990-6. PubMed ID: 20083261.
    Abstract:
    PURPOSE: We compared biochemical recurrence-free survival of patients who underwent radical retropubic prostatectomy vs robot assisted laparoscopic prostatectomy in concurrent series at a single institution. MATERIALS AND METHODS: A total of 2,132 patients were treated between June 2003 and January 2008. We excluded from study patients with prior treatment (115), missing data (83) and lymph node involvement (30). The remaining cohort (1,904) was compared based on clinical, surgical and pathological factors. Kaplan-Meier analysis was performed comparing biochemical recurrence after robot assisted laparoscopic prostatectomy and radical retropubic prostatectomy. A Cox proportional hazards model was generated to determine whether surgical approach is an independent predictor of biochemical recurrence. RESULTS: There were 491 radical retropubic prostatectomies (25.9%) and 1,413 robot assisted laparoscopic prostatectomies (74.1%) performed, and median followup was 10 months (IQR 2 to 23). On univariate analysis the robot assisted laparoscopic prostatectomy group was slightly lower risk with lower median prostate specific antigen (5.4 vs 5.8, p <0.01), a lower proportion of pathological grade 7-10 (48.5% vs 54.7%, p <0.01) and lower pathological stage (80.5% pT2 vs 69.6% pT2, p <0.01). The 3-year biochemical recurrence-free survival rate was similar between the robot assisted laparoscopic prostatectomy and radical retropubic prostatectomy groups on the whole as well as when stratified by pathological stage, grade and margin status. On multivariate analysis extracapsular extension (p <0.01), pathological grade 7 or greater (p <0.01) and positive surgical margin (p <0.01) were independent predictors of biochemical recurrence while surgical approach was not. CONCLUSIONS: The likelihood of biochemical recurrence was similar between groups when stratified by known risk factors of recurrence. Surgical approach was not a significant predictor of biochemical recurrence in the multivariate model. Our analysis is suggestive of comparable effectiveness for robot assisted laparoscopic prostatectomy, although longer term studies are needed.
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