PURPOSE: Because radical prostatectomy with robot-assisted surgery can lead to unwanted prostatic capsular incisions, capsular incision in normal prostatic tissue (CINPT) is not rare. To study the relationship between positive surgical margins (PSM) and CINPT after robot-assisted radical prostatectomy. METHODS: From September 2009 to January 2013, 203 consecutive robot-assisted prostatectomies were carried out by the same surgeon. A transperitoneal Montsouris technique was used for all cases, but modified to suit the use of the four-arm DaVinci device. The data were recorded prospectively in our database. Preoperative data were patient's age, body mass index, prostate-specific antigen level, prostate weight, percentage of positive biopsy, clinical stage, and Gleason score. Postoperative data were preservation of the bladder neck and neurovascular bundles (NVB), the presence of extended pelvic lymph-node dissection (ePLND), pathological stage, Gleason score, margin status, blood loss, and operative room times. The CINPT and no-CINPT groups were analysed and compared retrospectively. RESULTS: The CINPT rates were 23.2 versus 18.2 % for PSM. CINPT contrary to PSM seemed to be more frequent in low-risk prostate cancer. NVB preservation led to more CINPT (p = 0.01). At the multivariate analysis, only the absence of ePLND significantly affected the CINPT status (p = 0.03) and the absence of CINPT positively affected the PSM rate (p = 0.03). CONCLUSIONS: Capsular incision in normal prostatic tissue is not a predictive factor of PSM but reflected risk-taking during surgery especially when NVB preservation is indicated in low-risk prostate cancer. It can therefore only be considered a means to evaluate a surgical technique, but not a real predictor of PSM.
PURPOSE: Because radical prostatectomy with robot-assisted surgery can lead to unwanted prostatic capsular incisions, capsular incision in normal prostatic tissue (CINPT) is not rare. To study the relationship between positive surgical margins (PSM) and CINPT after robot-assisted radical prostatectomy. METHODS: From September 2009 to January 2013, 203 consecutive robot-assisted prostatectomies were carried out by the same surgeon. A transperitoneal Montsouris technique was used for all cases, but modified to suit the use of the four-arm DaVinci device. The data were recorded prospectively in our database. Preoperative data were patient's age, body mass index, prostate-specific antigen level, prostate weight, percentage of positive biopsy, clinical stage, and Gleason score. Postoperative data were preservation of the bladder neck and neurovascular bundles (NVB), the presence of extended pelvic lymph-node dissection (ePLND), pathological stage, Gleason score, margin status, blood loss, and operative room times. The CINPT and no-CINPT groups were analysed and compared retrospectively. RESULTS: The CINPT rates were 23.2 versus 18.2 % for PSM. CINPT contrary to PSM seemed to be more frequent in low-risk prostate cancer. NVB preservation led to more CINPT (p = 0.01). At the multivariate analysis, only the absence of ePLND significantly affected the CINPT status (p = 0.03) and the absence of CINPT positively affected the PSM rate (p = 0.03). CONCLUSIONS: Capsular incision in normal prostatic tissue is not a predictive factor of PSM but reflected risk-taking during surgery especially when NVB preservation is indicated in low-risk prostate cancer. It can therefore only be considered a means to evaluate a surgical technique, but not a real predictor of PSM.
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