Introduction: It has been hypothesized that transurethral en bloc (TUEB) of bladder tumor offers benefits over conventional transurethral resection of bladder tumor (cTURBT). This study aimed to compare disease outcomes of TUEB and cTURBT with focus on the different energy sources. Methods: A systematic search was performed using PubMed and Web of Science databases in June 2021. Studies that compared the pathological (detrusor muscle presence), oncological (recurrence rates) efficacy, and safety (serious adverse events [SAEs]) of TUEB and cTURBT were included. Random- and fixed-effects meta-analytic models and Bayesian approach in the network meta-analysis was used. Results: Seven randomized clinical trials (RCTs) and seven non-RCTs (NRCT), with a total of 2092 patients. The pooled 3- and 12-month recurrence risk ratios (RR) of five and four NRCTs were 0.46 (95% CI 0.29-0.73) and 0.56 (95% CI 0.33-0.96), respectively. The pooled 3- and 12-month recurrence RRs of four and seven RCTs were 0.57 (95% CI 0.25-1.27) and 0.89 (95% CI 0.69-1.15), respectively. The pooled RR for SAEs such as prolonged hematuria and bladder perforation of seven RCTs was 0.16 (95% CI 0.06-0.41) in benefit of TUEB. Seven RCTs (n = 1077) met our eligibility criteria for network meta-analysis. There was no difference in 12-month recurrence rates between hybridknife, laser, and bipolar TUEB compared with cTURBT. Contrary, laser TUEB was significantly associated with lower SAEs compared with cTURBT. Surface under the cumulative ranking curve ranking analyses showed with high certainty that laser TUEB was the best treatment option to access all endpoints. Conclusion: While NRCTs suggested a recurrence-free benefit to TUEB compared with cTURBT, RCTs failed to confirm this. Conversely, SAEs were consistently and clinically significantly better for TUEB. Network meta-analyses suggested laser TUEB has the best performance compared with other energy sources. These early findings need to be confirmed and expanded upon.

Cancer Prognostics and Health Outcomes Unit University of Montreal Health Center Montreal Canada

Department of Urology 2nd Faculty of Medicine Charles University Prague Czech Republic

Department of Urology Comprehensive Cancer Center Vienna General Hospital Medical University of Vienna Vienna Austria

Department of Urology King Fahad Specialist Hospital Dammam Saudi Arabia

Department of Urology King Faisal Medical City Abha Saudi Arabia

Department of Urology Medical University of Silesia Zabrze Poland

Department of Urology Motol University Hospital 2nd Faculty of Medicine Charles University Praha Prague Czech Republic

Department of Urology Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences Okayama Japan

Department of Urology The Jikei University School of Medicine Tokyo Japan

Department of Urology University Hospital Zurich Zurich Switzerland

Department of Urology University Medical Center Hamburg Eppendorf Hamburg Germany

Department of Urology University of Texas Southwestern Dallas Texas USA

Department of Urology Weill Cornell Medical College New York New York USA

Institute for Urology and Reproductive Health Sechenov University Moscow Russia

Karl Landsteiner Institute of Urology and Andrology Vienna Austria

Men's Health and Reproductive Health Research Center Shahid Beheshti University of Medical Sciences Tehran Iran

Research Center for Evidence Based Medicine Tabriz University of Medical Sciences Tabriz Iran

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