S Zanwar, A Joshi, V Noronha, VM Patil, N Sable, P Popat, S Menon, R Kothari, P Bhargava, A Kapoor, K Prabhash
Indian Journal of Cancer 2016 53(4):579-582
AIM: Patterns of care for metastatic renal cell carcinomas (mRCC) have seen tremendous reform in the last decade. Here, we present our pattern of care in second-line targeted therapy for mRCC. METHODS: Patients with mRCC treated with second-line therapy were included from a prospective database. Demographics, risk stratification, and treatment details were noted. Event-free survival (EFS) and overall survival (OS) was calculated using Kaplan–Meier method. Log-rank test was used to identify factors affecting EFS and OS. Multivariate analysis was performed using cox regression. RESULTS: Nearly 21.7% (46/212) of patients received second-line targeted treatment. Heng score for risk stratification showed 21.7% of patients in low risk, 36.9% in intermediate, and 34.8% in high risk group. Everolimus followed by pazopanib were the most common second-line therapies used in 65.2% and 13% of patients, respectively. The estimated median EFS was 3.5 months (95% confidence interval [CI] 2.7–4.26 months) and estimated median OS from the start of second-line therapy was 6.2 months (95% CI 3.4–9.0 months) with a median follow-up of 4.3 months. On univariate log-rank analysis, EFS of more than 6 months with first-line therapy was associated with improvement in EFS with second-line therapy (9.5 vs. 2.0 months; hazard ratio (HR) 0.364; P = 0.002). There was no factor independently associated with EFS or OS on multivariate analysis. CONCLUSION: Patterns of care for second line targeted therapy tend to vary with setting. A longer EFS with first-line therapy predicts improved outcomes with second-line treatment.
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