Is there a role for second transurethral resection in pTa high-grade urothelial bladder cancer?

Value of separate tumor base biopsy in transurethral resection of bladder tumors

Introduction

The aim of our study was to evaluate whether a biopsy from the tumor base after transurethral resection of bladder tumor (TURBT) has an impact on subsequent management of patients with bladder tumors. While tumor base biopsy at the completion of TURBT is a common practice, there is no definition of its role within the major international professional guidelines.

Material and methods

We retrospectively reviewed the records of consecutive patients undergoing TURBT between 2015 and 2019 at our institution. We recorded demographic and tumor characteristics of initial TURBT, tumor base biopsy and restaging TURBT pathology outcomes. The pathologic outcomes were correlated to assess the additional value of a separate tumor base biopsy.

Results

A total of 532 patients underwent TURBT. A separate tumor base biopsy after completion of TURBT was performed in 154 patients. The mean patient's age was 72.8 ±11.7 years (range 48–94) and 119 (77.2%) were men. In 40 patients (25.9%) muscle was absent in the pathological specimen of the tumor resection. Muscle was present in all but 6 (3.9%) tumor base biopsies. Of the 33 patients who underwent repeated transurethral resection for pT1 tumors, 2 had residual low-grade pTa, 1 had residual high-grade pT1, and 3 patients were upstaged to pT2.

Conclusions

Although tumor base biopsy at the completion of TURBT is a common practice, our analysis fails to demonstrate any tangible benefit in the staging of bladder tumors. In our experience tumor base biopsy did not change the management in patients with superficial or muscle invasive disease.

Identification of potential prognostic factors for absence of residual disease in the second resection of T1 bladder cancer

INTRODUCTION

The aim of this single centre retrospective study was to analyse the results of second resection (repeat transurethral resection of bladder tumour - reTURBT) after a macroscopically complete resection of T1 urothelial bladder tumour and to identify prognostic factors for absence of residual disease (T0) in the second resection of T1 bladder cancer.

MATERIAL AND METHODS

Patients with T1 bladder cancer diagnosed in a macroscopically complete initial resection who underwent second resection within 12 weeks were included into the retrospective analysis. Based on the presence or absence of residual disease, patients were grouped for further analysis. Univariate and multivariable logistic regressions were performed to identify potential prognostic factors.

RESULTS

Among the 139 patients who met the inclusion criteria, 96 (69.1%) had no residual disease (T0) and 43 (30.9%) had residual disease in the second resection (including muscle invasive bladder cancer in 2.2%). Adjusted odds ratios (OR) of T0 status obtained from the final model were as follows: detrusor muscle presence in the first resection (OR 3.05; 95% CI 1.12-8.35, p = 0.03), immediate post-operative intravesical mitomycin C administration after the first TURBT (OR 2.52, 95% CI 1.12-5.68; p = 0.03) and primary bladder cancer setting (OR 2.45, 95% CI 1.10-5.47; p = 0.03).

CONCLUSIONS

Our results add evidence regarding the importance of detrusor muscle presence in the first TURBT. Identification of predictors of T0 status at second resection could help design prospective studies assessing the possibility to avoid re-resection in selected patients with T1 bladder cancer without compromising oncological outcomes.