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Oncologic Outcomes of Sequential Intravesical Gemcitabine and Docetaxel Compared with Bacillus Calmette-Guérin in
Jacob Taylor1, Ashish M Kamat2, Drupad Annapureddy1
1University of Texas Southwestern Medical Center, Dallas, TX, USA.
Background And Objective:
Non-muscle-invasive bladder cancer (NMIBC) patients treated with additional bacillus Calmette-Guérin (BCG) may become unresponsive to BCG. Recently, sequential intravesical gemcitabine and docetaxel (gem/doce) are being used for NMIBC. This study aims to compare oncologic outcomes between sequential intravesical gem/doce versus additional BCG in patients with BCG-unresponsive NMIBC.
Methods:
Data were collected from ten academic institutions on patients with BCG-unresponsive NMIBC based on the Food and Drug Administration guidelines. Information on high-grade recurrence-free (HGRFS), progression-free (PFS), cystectomy-free (CFS), metastasis-free (MFS), cancer-specific (CSS), and overall (OS) survival was collected. The Kaplan-Meier method and Cox proportional hazard ratios (HRs) were used to determine differences in oncologic outcomes between the Gem/Doce and BCG groups.
Key Findings And Limitations:
Of 299 total patients, 204 underwent additional BCG treatment at the time of BCG unresponsiveness and 95 underwent gem/doce treatment. Rates of PFS (HR 2.6, 95% confidence interval [CI] 1.1-5.0, p = 0.03), CFS (HR 2.0, 95% CI 1.2-3.4, p = 0.01), and CSS (HR 3.7, 95% CI 1.1-12.3, p=0.03) were higher in patients receiving gem/doce. HGRFS, MFS, and OS were similar between both groups.
Conclusions And Clinical Implications:
The findings from this study suggest that intravesical gem/doce is associated with lower rates of progression than additional BCG in patients with BCG-unresponsive NMIBC who decline or are ineligible for cystectomy.
Patient Summary:
In this report, we looked at outcomes between patients with noninvasive bladder cancer who were treated with additional bacillus Calmette-Guérin (BCG) or gemcitabine-docetaxel combination after not responding to primary BCG therapy. We found that intravesical gemcitabine-docetaxel was associated with fewer progression events than additional salvage BCG therapy.
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