Dataset Information

Impact of Surgical Technique on Surgical Margin Status Following Partial Cystectomy.

ABSTRACT:

Introduction

We assessed the impact of open or minimally-invasive partial cystectomy on surgical margin status in a nationwide hospital-based cohort.

Materials and methods

Patients who underwent partial cystectomy from 2010 to 2014 were identified in the National Cancer Data Base. The primary outcome was surgical margin status. A multivariable logistic regression model was fitted to identify patient, hospital, and surgical factors associated with positive surgical margins (PSMs).

Results

Partial cystectomy was performed in 1,118 patients via open (n = 715, 64%), laparoscopic (n = 209, 19%), and robotic (n = 194, 17%) approaches. Overall, 220 (19.7%) patients had PSMs. The PSM rate by surgical approach was 19.6% for open, 18.2% for laparoscopic, and 21.6% for robotic (P = 0.678). Compared to open partial cystectomy, the laparoscopic (aOR 1.06, 95%CI 0.70-1.60, P = 0.782), and robotic (aOR 1.28, 95%CI 0.85-1.91, P = 0.235) approaches were not significantly different in terms of PSM rate. There were higher odds of PSMs in non-Hispanic blacks (aOR 1.93, 95%CI 1.09-3.39, P = 0.023) compared to non-Hispanic whites, and in patients with muscle invasive bladder cancer (aOR 3.28, 95%CI 2.00-5.37, P < 0.001) or tumor size ≥ 3 cm (aOR 1.67, 95%CI 1.21-2.30, P = 0.002). Tumors in a dome/urachal location had lower odds of a PSM compared to tumors in a nondome/urachal location (aOR 0.67, 95%CI 0.47-0.94, P = 0.022).

Conclusions

Our results suggest that partial cystectomy using a laparoscopic or robotic-assisted approach is not associated with an increased risk of PSMs compared to open partial cystectomy.

SUBMITTER: Owyong M

PROVIDER: S-EPMC7696003 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Publications

Impact of Surgical Technique on Surgical Margin Status Following Partial Cystectomy.

Owyong Michael M Koru-Sengul Tulay T Miao Feng F Razdan Shirin S Moore Kevin J KJ Alameddine Mahmoud M Punnen Sanoj S Parekh Dipen J DJ Ritch Chad R CR Gonzalgo Mark L ML

Urologic oncology 20190821 12

<h4>Introduction</h4>We assessed the impact of open or minimally-invasive partial cystectomy on surgical margin status in a nationwide hospital-based cohort.<h4>Materials and methods</h4>Patients who underwent partial cystectomy from 2010 to 2014 were identified in the National Cancer Data Base. The primary outcome was surgical margin status. A multivariable logistic regression model was fitted to identify patient, hospital, and surgical factors associated with positive surgical margins (PSMs).< ...[more]

PMID: 31445895

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Project description:Background and objectivePositive surgical margins (PSMs) following radical prostatectomy (RP) have been seen as inherently unfavorable. However, a large international multi-institutional study recently revealed that unifocal PSMs (UPSMs) had no impact on prostate cancer-specific mortality (PCSM), whereas multifocal PSMs (MPSMs) did. Our aim was to assess the relative impact of PSMs versus percentage tumor volume (PTV) on PCSM.MethodsWe analyzed data for 1552 patients who underwent robot-assisted RP performed by a single surgeon between 2002 and 2018 at a tertiary referral center with up to 15-yr follow-up. Patients were divided into negative surgical margin (NSM), UPSM, and MPSM groups, with PTV stratification using a cutoff of 40%. The primary outcome was stepwise multivariate regression analysis of predictors of PCSM (pT stage, pathological Gleason grade group, PTV, UPSM, and MPSM). The secondary outcome was the risk of 15-yr PCSM via Kaplan-Meier analysis.Key findings and limitationsThe group with 40-100% PTV was older and presented with more advanced grade and stage. High PTV was significantly associated with greater risk of PSM, biochemical recurrence, PCSM, and overall mortality at 15 yr (p < 0.001). In addition to high stage and grade, MPSM predicted PCSM in multivariate analysis, but lost predictive significance when PTV was included. Limitations of the study include the retrospective nature and the single-center setting.Conclusions and clinical implicationsOur study further challenges the belief that MPSMs inherently have an adverse impact on PCSM. Instead, MPSMs appear to signify more aggressive underlying disease that predominantly drives oncological outcomes. We recommend considering PTV as a more reliable predictor of PCSM. While avoidance of PSMs remains a critical surgical principle, this goal in prostate cancer needs to be weighed against urinary and sexual function outcomes.Patient summaryAfter surgery to remove the prostate in men with prostate cancer, samples from the edge of the prostate that are positive for tumor cells are called positive surgical margins (PSMs). Results from our study show that a PSM on its own is not necessarily an adverse factor. However, PSMs may be a sign of higher severity of prostate cancer. We found that men with a high tumor volume have a higher risk of dying from their prostate cancer.

Project description:BackgroundIt is inconclusive whether R1 margin determined by postoperative pathological examination indicates worse long-term survival in gastric cancer (GC) patients after curative intent resection (CIR). Hence, we aimed to systematically pool the conflicting evidence to fill this gap.MethodsThe present study was performed according to the published protocol and Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Published studies examining the impact of microscopic margin status on overall survival (OS) and 5-year OS rate in GC were systematically searched in PubMed, Embase, and Cochrane Library databases. RevMan 5.3 was used to conduct statistical analysis, and the Grading of Recommendations, Assessment, Development, and Evaluations approach was used to assess the certainty of evidence for each outcome.ResultsTwenty-three retrospective cohort studies including 19 992 patients were analyzed. The pooled hazard ratio for OS of 14 studies was 2.06 (95% confidence interval [CI]: 1.61-2.65, low certainty), indicating that R1 margin predicted inferior OS. Subgroup and sensitivity analyses upheld the statistical stability of this finding. The pooled odds ratio (OR) of 14 studies was .21 (95% CI: .17-.26, moderate certainty), demonstrating that the presence of R1 margins was associated with a poorer 5-year OS rate. Sensitivity analyses and most of the subgroup analyses confirmed this finding, except the "esophagogastric junction (EGJ) cancers" subgroup, which included two studies with a pooled OR of .41 (95% CI: .10-1.61).ConclusionR1 margin detected by pathological examination might exhibit a high correlation with poorer OS and 5-year OS rate in GC (except EGJ cancers) patients who underwent CIR. To figure out the effect of R1 margin on survival of different stages and histological types need prospective studies with large sample sizes and standardized methods. What is the best treatment for R1 margin patients also need more in-depth and special research.

Project description:PurposeTo evaluate the impact of modifications to anatomical apical dissection including a puboprostatic open-collar technique, which visualizes the lateral aspect of the apex and dorsal vein complex (DVC) covering the rhabdosphincter while preserving the puboprostatic collar, on positive surgical margin (PSM) and continence recovery.MethodsOne-hundred-and-sixty-seven patients underwent gasless single-port retroperitoneoscopic radical prostatectomy using a three-dimensional head-mounted display system. Sequentially modified surgical techniques comprised puboprostatic open-collar technique, sutureless transection of the DVC, retrograde urethral dissection, and anterior reconstruction. The associations of these modifications with PSM and continence recovery were assessed.ResultsThe puboprostatic open-collar technique, sutureless DVC transection, and retrograde urethral dissection were significantly associated with lower apical PSM (P = 0.003, 0.003, and 0.010, respectively). The former two also showed similar associations in 84 patients with anterior apical tumor (P = 0.021 and 0.030, respectively). Among 92 patients undergoing all of these three procedures, overall and apical PSM rates were 13.0% and 3.3%, respectively. Retrograde urethral dissection (odds ratio [OR] 2.73, P = 0.004) together with nerve sparing (OR 2.77, P = 0.003) and anterior apical tumor (OR 0.45, P = 0.017) were independently associated with immediate continence recovery. A multivariable model for 3-month continence recovery included anterior apical tumor (OR 0.28, P = 0.003) and puboprostatic open-collar technique (OR 3.42, P = 0.062). Immediate and 3-month continence recovery rates were 56.3% and 85.4%, respectively, in 103 patients undergoing both the puboprostatic open-collar technique and retrograde urethral dissection.ConclusionNovel anatomical apical dissection utilizing a puboprostatic open-collar technique may favorably impact on both apical surgical margin and continence recovery.

Project description:IntroductionGenerally, complete resection with cancer cell negative (R0) margin has been accepted as the most effective treatment of gastric cancer and positive resection (R1/R2) margin has been associated with decreased survival to varied degrees. However, the independent impact of microscopical positive (R1) margin on long-term survival may be confounded. No meta-analysis has worked at the association between R1 margin and outcomes of gastric cancer and the available evidence are scant. Therefore, we plan to conduct a systematic review and meta-analysis to quantitatively explore the role of R1 margin on gastric (including oesophagogastric junction) cancer survival after curative intent resection.Methods and analysisThe protocol was conducted according to Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols guideline. A systematic search of PubMed, Embase and the Cochrane Central Register of Controlled Trials databases will be performed from their inceptions to 30 April 2020 to identify randomised controlled trials (RCTs), cohort studies and case-control studies focusing on the impact of R1 margin on survival of gastric cancer after curative intent resection. The primary outcome will be the overall survival (OS) and disease-free survival (DFS) and the secondary outcomes will be 5-year OS rate and 5-year DFS rate. The Cochrane tool for bias assessment in randomised trials and Risk Of Bias In Non-randomised Studies-I for the assessment of bias in non-randomised studies (NRS) will be used. Statistical heterogeneity will be assessed by visual inspection of forest plots and measured using the I2 statistics. A fixed-effect model will be used when heterogeneity is low, otherwise, a random-effect model will be chosen. Publication bias will be assessed by funnel plots, subgroup analysis and sensitivity analysis will be performed in the right context. For each outcome, we will perform data synthesis separately for RCTs and NRS using Rev Man V.5.3 software and compile 'summary of findings' tables separately for RCTs and NRS using GRADEpro software. Grading of Recommendations, Assessment, Development and Evaluations considerations will also be used to make an overall assessment of the quality of evidence.Ethics and disseminationThere is no requirement for ethics approval because no patient data will be collected at an individual level in this systematic review and meta-analysis.The results of this systematic review will be published in a peer-reviewed journal and presented at relevant conferences, any deviations from the protocol will be clearly documented and explained in its final report.Prospero registration numberCRD42020165110.

Dataset Information

Impact of Surgical Technique on Surgical Margin Status Following Partial Cystectomy.

Introduction

Materials and methods

Results

Conclusions

Publications

Impact of Surgical Technique on Surgical Margin Status Following Partial Cystectomy.

Similar Datasets

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