The results of concurrent chemo‐radiotherapy for recurrence after treatment with bacillus Calmette‐Guérin for non‐muscle‐invasive bladder cancer: is immediate cystectomy always necessary?

Abstract

To report our original experience in patients in whom bacille Calmette-Guérin (BCG) therapy has failed for T1 bladder cancer with subsequent progression to T2 disease treated with chemo-radiotherapy, as the management of recurrent high-grade T1 bladder cancer after failed BCG therapy is challenging, and radical cystectomy is the standard treatment because there are no well established second-line bladder-preserving therapies. From 1988 to 2002, 18 patients with T2 recurrence after failure of BCG therapy for T1 bladder cancer were treated with chemo-radiotherapy at the authors' institution. Patients received a visibly complete transurethral resection of the bladder tumour (TURBT) and concurrent chemo-radiotherapy with a mid-treatment evaluation after 40 Gy. Patients with less than a complete response had a prompt cystectomy; the others completed radiotherapy to 64-65 Gy. The primary treatment outcome was freedom from cystectomy due to recurrence not treatable by conservative measures; secondary outcomes included disease-specific (DSS) and overall survival (OS). With a median follow-up of 7.0 years, only one patient had persistent tumour at re-staging TURBT and had an immediate cystectomy. Of the remaining 17 patients, 10 (59%) were free of any bladder recurrence. The actuarial 7-year DSS and OS were 70% and 58%, respectively. At 7 years, 54% of patients were alive with intact bladders and free of invasive recurrence. In this study we specifically evaluated patients with apparently small muscle-invasive recurrences after BCG treatment for T1 bladder cancer. Selective bladder preservation with chemo-radiotherapy is possible, with low morbidity and a high chance of long-term bladder control. If successful in treating T2 recurrences after BCG therapy, it now seems timely to critically evaluate chemo-radiotherapy as an alternative to immediate cystectomy in the management of patients with T1 recurrences after BCG.