Prognostic value of prostate volume in non-muscle invasive bladder cancer

Role of Maximal Transurethral Resection Preceding Partial Cystectomy for Muscle-Invasive Bladder Cancer

PURPOSE

We aimed to evaluate whether maximal transurethral resection (TUR) affects the oncological outcome of partial cystectomy (PC) performed in patients with muscle-invasive bladder cancer (MIBC), although radical cystectomy (RC) and trimodal therapy (TMT) are regarded as standard treatments for MIBC.

METHODS

In this retrospective study, we evaluated the data of 98 patients who underwent PC due to MIBC between January 2006 and December 2018. Of the 98 patients, 71 underwent maximal TUR. We evaluated the recurrence-free survival (PFS), pelvic recurrence-free survival (pPFS), cancer-specific survival (CSS), and overall survival (OS) using the Kaplan-Meier method according to the maximal TUR status. Variables associated with survival were analyzed using Cox regression analyses.

RESULTS

The 5-year PFS (42.5% vs. 20.3%, p = 0.008), pPFS (50.7% vs. 24.1%, p = 0.003), and CSS (74.0% vs. 51.0%, p = 0.016) were also higher in patients who underwent maximal TUR. The multivariable Cox regression analysis showed that maximal TUR was associated with PFS (hazard ratio [HR] = 0.500, p = 0.029), pPFS (HR = 0.353, p = 0.004), and CSS (HR = 0.416, p = 0.027). However, maximal TUR did not affect the OS (HR = 0.618, p = 0.132).

CONCLUSION

PC resulted in acceptable oncological outcomes in patients with MIBC, while maximal TUR played an important role in improving the oncological outcomes. PC after maximal TUR can be suggested as a treatment option for MIBC patients who are unable to undergo RC and TMT.

Genetically supported causality between benign prostate hyperplasia and urinary bladder neoplasms: A mendelian randomization study

Background: Observational studies have suggested a possible association between benign prostate hyperplasia (BPH) and bladder cancer (BLCA). However, these studies are prone to errors and limitations or confounding factors, making them unsuitable for assessing the causal relationship between BPH and BLCA. Objective: Two-sample Mendelian randomization (MR) was performed to determine a possible association between genetically predicted BPH and the risk of BLCA. Methods: A two-sample MR analysis was performed utilizing the Integrative Epidemiology Unit genome-wide association (GWAS) database of the Medical Research Council, United Kingdom A series of control steps, including five primary methods, were performed to identify the most suitable instrumental variables (IVs) for MR analysis. Sensitivity analysis was conducted to avoid statistical errors, including heterogeneity and pleiotropic bias. Results: Genetic variants associated with BPH (P < 5 × 10-8) and BLCA (P < 5 × 10-6) were identified as instrumental variables and assessed using GWAS summary data (BPH, 4,670 cases vs. 458,340 controls; BLCA, 1,279 cases vs. 372,016 controls). BPH exhibited a positive effect on the occurrence of BLCA (inverse variance weighted (IVW), odds ratio (OR) = 1.095, 95% confidence interval (CI) = 1.030-1.165, p = 0.003), but there was no causal effect for BLCA on BPH (IVW, OR = 1.092, 95% CI = 0.814-1.465, p = 0.554). Conclusion: Genetically predicted BPH was associated with a higher risk of BLCA in all histological subtypes. In contrast, the evidence was not significant to back the causality of genetically induced BLCA on BPH. These findings indicate that BPH plays a key role in developing BLCA in the European population. Further studies are needed to uncover the underlying mechanisms.