Outcomes and tolerability of selective bladder preservation by combined modality therapy for invasive bladder cancer in elderly patients.

316 Background: The median age of patients diagnosed with muscle invasive bladder cancer (MIBC) in the US is 72 years old, and only about half of those over 70 years receive potentially curative therapy (radical cystectomy, chemoradiation, definitive radiation), suggesting a large proportion of patients are undertreated. To address this unmet need, we examined the outcomes and tolerability of chemoradiation (chemoRT) in the elderly. Methods: We conducted an analysis of 455 patients with cT2-T4a disease treated at our institution between 1986 and 2013. Patients underwent induction chemoRT (40Gy) after transurethral resection of bladder tumor (TURBT). Patients achieving a complete response (CR) received consolidation chemoRT to a total goal dose of 64-65Gy. Those with less than a CR or an invasive recurrence were recommended to undergo salvage cystectomy. Elderly was defined as 75 years or older. For comparison with younger patients, propensity score matching was performed based on sex, T-stage, hydronephrosis, completion of TURBT, and decade of treatment. Disease-specific survival (DSS) was evaluated using Kaplan-Meier method. Results: Median age was 66 years (range 27-94). One hundred and one patients (22%) were 75 years or older. Median follow-up was 7.4 years for surviving patients. In a propensity score matched pair analysis of 84 elderly and 84 younger patients, DSS at 5 and 10 years for the elderly was 64.8% and 51%, compared to 71.7% and 62.0% for younger patients (p = 0.28). Elderly patients, compared to the younger patients, had similar rates of ED visits during treatment (10% vs 12%, p = 0.76), hospital admissions for any cause (17% vs. 14%, p = 0.8), unplanned treatment breaks for any cause (24% vs. 12%, p = 0.16), and discontinuation of therapy due to toxicities (6% vs 7%, p = 1.0). Conclusions: In elderly patients with MIBC, outcomes and tolerability of bladder-sparing chemoRT are comparable to that of younger patients. Clinicians should not deny patients potentially curative therapies based on age alone, although further investigation is warranted.