Feasibility of transurethral resection for muscle infiltrating carcinoma of the bladder: long-term followup of a prospective study

Abstract

Purpose: We analyzed the long-term results of radical transurethral resection for the treatment of a large series of patients with muscle infiltrating bladder cancer entered into a prospective study to determine progression predictive factors.

Materials and methods: The study included 133 patients with invasive bladder cancer treated by radical transurethral resection who had negative biopsies of the muscle layer of the tumor bed. Followup was more than 5 years for all subjects and more than 10 years in 59 (44.4%). A comparative nonrandomized study was performed of a control group of 76 patients with invasive pathological stage pT2-3a, N0-3 bladder cancer treated by cystectomy. In those patients treated by radical transurethral resection univariate and multivariate analyses were performed to establish clinical progression predictive factors.

Results: At 5 and 10 years of followup cause specific survival rates were 80.5 and 74.5%, and bladder preservation rates were 82.7 and 79.6%, respectively. No significant difference was noted in terms of cause specific survival, with respect to the control group. The initial presence of associated bladder carcinoma in situ was the only independent progression predictive factor.

Conclusions: For patients with invasive bladder cancer radical transurethral resection is justified when the tumor is clinically limited to the muscular layer and when all biopsies of the periphery and depth of the tumor bed show muscular tissue negative for tumor cells. Patients with initial associated bladder carcinoma in situ should not be excluded from this treatment but endovesical bacillus Calmette-Guerin immunotherapy should be administered and a closer followup is recommended.