Induction Chemotherapy Followed by Surgery Versus Upfront Radical Cystectomy in Patients With Clinically Node-positive Muscle-invasive Bladder Cancer.

Abstract

The aim of this study was to compare survival outcomes in patients with clinically node-positive muscle-invasive bladder cancer receiving induction chemotherapy (IC) followed by surgery and those who underwent upfront radical cystectomy (RC). Outcomes were reviewed in patients with cT2-4N1-3M0 bladder cancer treated with IC followed by surgery or upfront RC between January 1995 and June 2017. Survival outcomes were analyzed using a propensity score matched cohort analysis. Of the 340 eligible patients, 106 received IC and 234 underwent upfront RC. The overall 3-year metastasis-free survival rate and 5-year cancer-specific survival rate of patients in the IC and RC groups were similar (49.4% vs. 46.0% and 49.6% vs. 49.8%, respectively). The 5-year cancer-specific survival rate of cN1-2 patients was higher in the IC group than the RC group (68.1% vs. 52.9%; P= .035). However, the 5-year cancer-specific survival rate of patients with cN3 cancers was significantly lower in the IC group than the RC group (19.2% vs. 44.5%; P= .015). In this study, IC was seen to improve cancer-specific survival in patients with cN1-2 muscle-invasive bladder cancers but was associated with poorer survival outcomes than upfront RC in patients with cN3 cancers. Further investigation in prospective, randomized studies is warranted.