Background: Data for bladder-sparing treatment (BST) in bacillus Calmette-Guerin (BCG)-unresponsive non–muscle-invasive bladder cancer (NMIBC) patients report short-term outcomes limited to 1–2 yr. Objective: To assess long-term survival outcomes of BCG-unresponsive NMIBC patients treated with BST. Design, setting, and participants: BCG-unresponsive NMIBC patients diagnosed between January 2000 and September 2021 from an institutional NMIBC registry were evaluated. Intervention: Long-term survival outcomes for patients receiving BST, early radical cystectomy (RC), and delayed RC were compared. Outcome measurements and statistical analysis: The primary endpoints were overall survival (OS) and cancer-specific survival (CSS). Results and limitations: In total, 114 patients with a median follow-up of 71.2 mo (interquartile range: 32.6–132.2) were analyzed. There were no significant differences in OS (hazard ratio [HR]: 1.40, 95% confidence interval [CI]: 0.68–2.89, p = 0.4) or CSS (HR: 0.88, 95% CI: 0.22–3.55, p = 0.9) between patients undergoing early RC (n = 38) and BST (n = 76). At 60 mo, BST patients had a high-grade recurrence-free rate, muscle-invasive disease/metastasis progression-free rate, and avoidance of RC rate of 37%, 83%, and 58%, respectively. Current smoker status (HR: 4.44, 95% CI: 1.41–13.97, p = 0.011) was the only variable predictive of high-grade recurrence following a multivariable analysis. The median time to RC from BCG-unresponsive date was 2.1 and 11.7 mo for those undergoing early RC and delayed RC (after BST), respectively. Patients treated with early RC had a higher incidence of cT1 disease (53% vs 36%, p = 0.049) and lymphovascular invasion (LVI; 11% vs 0%, p = 0.011) compared to patients treated with BST. Survival outcomes were similar between groups: 10-yr OS—58% versus 50% (HR: 1.40, 95% CI: 0.68–2.89, p = 0.4), and 10-yr CSS—81% versus 85% (HR: 0.88, 95% CI: 0.22–3.55, p = 0.9). Conclusions: An analysis of long-term survival of BCG-unresponsive NMIBC patients receiving BST suggests that it may be safe in patients without LVI and/or variant histology and nonsmokers. Survival outcomes for patients treated with BST may not be inferior to those receiving early RC. Patient summary: Bladder-sparing treatment can be offered to appropriately selected patients who have bacillus Calmette-Guerin (BCG)-unresponsive non–muscle-invasive bladder cancer. Long-term outcomes may not be inferior to those for patients who opt for early radical cystectomy.
Bibliographical noteFunding Information:
Funding/Support and role of the sponsor: This research was supported by the Wayne B. Duddlesten Professorship in Cancer Research and the Raymond and Maria Floyd Bladder Cancer Research Foundation Grant to Ashish M. Kamat, and by National Institute of Health/National Cancer Institute UT MD Anderson SPORE in Genitourinary Cancer (Bladder; P50CA091846) to Colin P. Dinney.
© 2023 The Author(s)
- Bacillus Calmette-Guerin
- Non–muscle-invasive bladder cancer
- Radical cystectomy
ASJC Scopus subject areas