Journal
BRITISH JOURNAL OF CANCER
Volume 105, Issue 11, Pages 1635-1639Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/bjc.2011.389
Keywords
tyrosine kinase inhibitor; refractory; sunitinib; sorafenib; everolimus; renal cell carcinoma
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BACKGROUND: Treatment of everolimus-resistant disease remains largely undefined in metastatic renal cell carcinoma (mRCC). We report on 40 patients (pts) who receive systemic treatment after failure of everolimus. PATIENTS AND METHODS: Forty pts received sunitinib (n = 19), sorafenib (n = 8), dovitinib (n = 10) or bevacizumab/interferon (n = 3) after failure of everolimus. Median progression-free survival (PFS), overall survival (OS) and best tumour response (according to Response Evaluation Criteria In Solid Tumors) were analysed retrospectively. Kaplan-Meier, log-rank test and Cox regression analyses were used to estimate or predict OS and PFS. RESULTS: Treatment of everolimus-resistant disease was associated with a PFS of 5.5 months. (range 0.4-22.3) and an objective partial remission (PR) in 4 pts (10%) and stable disease (SD) in 22 pts (55%). In univariate analyses, first-line treatment with sorafenib was the only variable to correlate with a prolonged PFS of treatment in everolimus-resistant disease (P = 0.036). However, its significance as a predictive marker for subsequent therapy could not be verified in multivariate analyses. CONCLUSIONS: Vascular endothelial growth factor targeted therapy shows promising activity in everolimus-resistant metastatic renal cancer and warrants further studies. British Journal of Cancer (2011) 105, 1635-1639. doi: 10.1038/bjc.2011.389 www.bjcancer.com
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