Surgical margin status does not affect overall survival following radical prostatectomy: A single institution experience with expectant management

Department of Urology, University of Miami Miller School of Medicine, Miami, Florida 33101, USA.
The Canadian Journal of Urology (Impact Factor: 0.98). 06/2012; 19(3):6280-6.
Source: PubMed


The objective of this report is to describe the oncologic outcomes of men with margin-positive prostate cancer who were managed expectantly following radical prostatectomy.
Between January 1992 and January 2011, 2166 men underwent an open radical prostatectomy by a single surgeon. Of these patients, 1592 (74%) had complete data and met the inclusion criteria of negative lymph nodes and no history of neoadjuvant or adjuvant therapy. This cohort was dichotomized by the presence or absence of at least one positive surgical margin. Groups were compared for differences in recurrence-free and overall survival.
In total, 507 (32%) of 1592 patients had at least one positive surgical margin. Clinical and pathological characteristics of these patients indicated more aggressive disease. The median follow up for biochemical recurrence and overall survival was 3.4 years and 7.7 years, respectively. Of those patients with a positive margin, 147 (29%) recurred, with estimated 5 and 10 year biochemical recurrence rates of 31% and 47%, respectively. Multivariate analysis demonstrated that the presence of a positive margin was associated with a 2.45-fold increased hazard of recurrence (p < 0.001). Despite initial observation, surgical margin status was not associated with a decrease in overall survival on both uni- (p = 0.684) and multivariate analyses (p = 0.177).
Although a positive surgical margin is associated with an increased risk of biochemical recurrence, patients in our series were not at an increased risk of all-cause mortality.

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    • "This reluctance to widely adopt ART might be attributed to the bias of urologic surgeons on the perceived toxicity of radiotherapy. Moreover, recent data demonstrated that patients with PSM who underwent SRT after biochemical recurrence (BCR) had similar long-term outcomes to those who had adjuvant radiotherapy and recurred [11,12]. "
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    ABSTRACT: Recently, three prospective randomized trials have shown that adjuvant radiotherapy (ART) after radical prostatectomy for the patients with pT3 and/or positive margins improves biochemical progression-free survival and local recurrence free survival. But, the optimal management of these patients after radical prostatectomy is an issue which has been debated continuously. The object of this study was to determine the necessity of adjuvant radiotherapy (ART) by reviewing the outcomes of observation without ART after radical prostatectomy (RP) in patients with pathologic indications for ART according to the American Urological Association (AUA)/American Society for Radiation Oncology (ASTRO) guideline. From a prospectively maintained database, 163 patients were eligible for inclusion in this study. These men had a pathological stage pT2-3 N0 with undetectable PSA level after RP and met one or more of the three following risk factors: capsular perforation, positive surgical margins, or seminal vesicle invasion. We excluded the patients who had received neoadjuvant hormonal therapy or adjuvant treatment, or had less than 24 months of follow-up. To determine the factors that influenced biochemical recurrence-free (BCR), univariate and multivariate Cox proportional hazards analyses were performed. Among the 163 patients, median follow-up was 50.5 months (24.0-88.2 months). Of those men under observation, 27 patients had BCR and received salvage radiotherapy (SRT). The multivariate Cox analysis showed that BCR was marginally associated with pre-operative serum PSA (P = 0.082), and the pathologic GS (HR, 4.063; P = 0.001) was an independent predictor of BCR. More importantly, in 87 patients with pre-operative PSA < 6.35 ng/ml and GS <= 7, only 3 developed BCR. Of the 163 patients who qualified for ART based on the current AUA/ASTRO guideline, only 27 (16.6%) developed BCR and received SRT. Therefore, using ART following RP using the current recommendation may be an overtreatment in an overwhelming majority of the patients.
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    World Journal of Urology 10/2013; 32(5). DOI:10.1007/s00345-013-1199-8 · 2.67 Impact Factor
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    ABSTRACT: To assess the influence of tumour zonality on biochemical recurrence (BCR) after radical prostatectomy (RP) with a histologically confirmed positive surgical margin (PSM). Data from 382 patients that underwent RP with either transition zone (TZ) or peripheral zone (PZ) tumours involving PSMs between 1998 and 2010 were retrieved from the Abbott West Australian Prostatectomy Database. Statistical analysis was used to evaluate the relationship of various tumour clinicopathological parameters, e.g. zonal origin of tumour, tumour volume, Gleason score, and stage to the development of BCR RESULTS: There were 51 TZ and 331 PZ tumours with PSMs identified. The TZ tumours compared with PZ tumours were larger (median 5.67 vs 3.64 mL, P < 0.001), more frequently lower grade (Gleason score 6 33% vs 5%, P < 0.01), organ confined (51% vs 35.6%, P = 0.073), and preferentially involved the bladder neck (49% vs 6%, P < 0.001). Tumour zonality was not associated with BCR for the entire cohort. TZ and PZ tumours had similar 5-year BCR-free survival rates (58% vs 63%, P = 0.691) and comparable time to development of BCR (14.4 vs 19.2 months, P = 0.346). On univariate analysis, preoperative PSA level, PSM at the bladder neck, tumour volume, Gleason score (P < 0.001) and tumour stage were independent predictors of BCR for the entire cohort. On multivariate analysis tumour volume and Gleason score retained significance as independent predictors of BCR. Tumour zonality was not directly associated with BCR. Of the patients who received adjuvant therapy, the incidence of BCR was similar for TZ and PZ tumours (58% vs 67%, P = 0.077), although TZ tumours failed significantly earlier (mean 4.4 vs 16.4 months, P = 0.037). PSA recurrence in patients with histologically confirmed PSMs after RP is independent of the zonal location of the index tumour. However, tumour zonal origin may have an indirect influence on PSA relapse, as TZ tumours tend to be of large volume and more likely involve the bladder neck margin, both risk factors for BCR. Bladder neck margin involvement is associated with higher rates of BCR than other sites of PSMs. The preoperative identification of TZ tumours might aid surgical planning with appropriate alteration of RP technique to incorporate wider surgical margins at the bladder neck. Adjuvant radiotherapy appears to be associated with adverse outcome for TZ tumours, a novel finding which warrants further investigation. © 2015 The Authors. BJU International © 2015 BJU International.
    BJU International 07/2015; DOI:10.1111/bju.13173 · 3.53 Impact Factor

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