Comparing the efficacies of neoadjuvant non-cisplatin-based and cisplatin-based chemotherapies in obtaining pathologic complete remissions in muscle-invasive bladder cancer.

Abstract

e15577 Background: Muscle-invasive bladder cancer (MIBC) is an aggressive disease and cisplatin-based neoadjvuant chemotherapy is standard therapy. Because of renal insufficiency, many patients are unfit to receive cisplatin and, instead receive carboplatin-based chemotherapy. The efficacy of carboplatin-based chemotherapy has not been studied in this setting. We performed a study comparing the efficacies of neoadjuvant carboplatin-containing and cisplatin-containing chemotherapies in achieving pathologic complete responses (pCR) in MIBC. Overall survival (OS) was also calculated. Methods: Medical records for all patients who underwent cystectomy at MedStar Washington Hospital Center between January 1, 2002 and December 31, 2011 were reviewed to determine which neoadjuvant chemotherapy was given and whether a pCR was reached at the time of cystectomy. OS was also calculated. Results: 232 patients qualified for study. 13 received neoadjuvant cisplatin-based treatment (Group 1) and 12 received neoadjuvant carboplatin-based treatment (Group 2). pCR rates were 53.8% and 41.7% in Groups 1 and 2, respectively. 5-year OS for Groups 1 and 2 were 69% and 75%, respectively. Conclusions: Given the limitations of this small retrospective analysis, carboplatin-based neoadjuvant chemotherapy prior to cystectomy for MIBC appears to be comparable in efficacy to cisplatin-based neoadjuvant chemotherapy.