Complete Transurethral Resection before Radical Cystectomy May Improve Oncological Outcomes

Abstract

<b><i>Objectives:</i></b> The objective of this study was to assess the impact of complete transurethral resection of bladder tumors (TURBTs) before radical cystectomy on pathological and oncological outcomes of patients with muscle-invasive bladder cancer (MIBC) and high-risk non-MIBC. <b><i>Materials and Methods:</i></b> The charts of all patients who underwent radical cystectomy for bladder cancer in 2 academic departments of urology between 1996 and 2016 were retrospectively reviewed. Patients were divided into 2 groups according to the completeness of the last endoscopic resection before radical cystectomy: macroscopically complete transurethral resection (complete) or macroscopically incomplete transurethral resection (incomplete). The primary end point was the recurrence-free survival (RFS). Secondary end points included cancer-specific survival (CSS) and rates of pT0 and downstaging. <b><i>Results:</i></b> Out of 486 patients included for analysis, the TURBT immediately preceding radical cystectomy was considered macroscopically complete in 253 patients (52.1%) and incomplete in 233 patients (47.9%). In multivariate analysis, macroscopically complete TURBT was the strongest predictor of both pT0 disease (OR = 3.1; <i>p</i> = 0.02) and downstaging (OR = 7.1; <i>p</i> &#x3c; 0.0001). After a median follow-up of 41 months, macroscopically complete TURBT was associated with better RFS (5-year RFS: 57 vs. 37%; <i>p</i> &#x3c; 0.0001) and CSS (5-year CSS: 70.8 vs. 54.5%; <i>p</i> = 0.002). In multivariate analysis adjusting for multifocality, weight of endoscopic resection specimen, cT4 stage on preoperative imaging, interval between endoscopic resection and radical cystectomy, neoadjuvant chemotherapy, pT stage, and associated carcinoma in situ, macroscopically complete endoscopic resection remained the main predictor of better RFS (HR = 0.4; <i>p</i> = 0.0003) and the only preoperative factor associated with CSS (HR = 0.5; <i>p</i> = 0.01). <b><i>Conclusion:</i></b> A macroscopically complete TURBT immediately preceding radical cystectomy may improve pathological and oncological outcomes in patients with MIBC and high-risk MIBC.