Recent developments in perioperative combination therapy in muscle-invasive bladder cancer.

Abstract

A summary of recent literature to provide a comprehensive overview of the current state of systemic perioperative treatment combinations for muscle-invasive bladder cancer (MIBC). We discuss recent developments in standard and experimental treatment modalities. The VESPER trial has shown that six cycles of neoadjuvant dose-dense MVAC are superior to four cycles of gemcitabine/cisplatin (GC), though it is unclear whether the superiority is derived from the specific regimen or number of cycles. Adjuvant cisplatin-based chemotherapy, a subject of longstanding debate, was shown to have comparable overall survival-benefit to neoadjuvant chemotherapy in an updated meta-analysis. Neoadjuvant chemotherapy and anti-PD-(L)1 show encouraging results, but with no comparative studies to standard care, context is lacking. Immunotherapeutic neoadjuvant anti-CTLA-4/PD-(L)1 combinations or combinations of checkpoint inhibitors with antibody-drug-conjugates are in early stages of development and show promising preliminary results. Six cycles of neoadjuvant dose-dense MVAC are superior to four cycles of gemcitabine/cisplatin. Adjuvant cisplatin-based chemotherapy is a viable option for patients with high-risk tumours who did not receive prior neoadjuvant treatment. The added value of anti-PD-(L)1 to chemotherapy still needs to be established. Novel developments in immunotherapy combinations, while promising, are still in an early stage and randomized studies are ongoing.