Retrospective analysis of sorafenib as first or second target therapy in mRCC patients in Italian centers: An update.

Abstract

e15524 Background: With several agents available for the treatment of metastatic renal cell carcinoma (mRCC) a better understanding of their use in daily clinical practice is fundamental in the decision-making process. Methods: The REtrospective analysis of Sorafenib (So) as 1st or 2nd targET therapy (RESET) in mRCC was a retrospective, observational field study that assessed the use and safety of So in clinical practice in Italian centers. Treatments were determined by physicians per local prescribing guidelines. Patients (pts) treated with So single agent as 1st or 2nd target therapy (TT) for mRCC between 1st Jan 2008 and 31st Dec 2010 were eligible for inclusion. Endpoints included safety, overall survival (OS), progression-free survival, response rate and treatment duration. Subgroup analyses included age, ECOG performance status, prior therapy, number of metastases and line of TT with So. Results: From Feb to Jul 2012, 358 pts from 37 Italian centers were enrolled. The most common ≥ grade 3 drug-related adverse events were hand-foot skin reaction (6.7%), rash (2.2%), hypertension, fatigue and diarrhea (1.7% each). In the overall population, median OS was 17.2 months (mos) (95% CI 15.4 – 19.6 mos) and median PFS was 5.9 mos (95% CI 4.9-6.7 mos). Median duration of treatment with So was 5.03 mos. Disease control (complete response + partial response + stable disease) was observed in 198(56%) pts. In pts receiving So as first or as second TT median OS was 19.9 mos (95% CI 15.9-25.3 mos) and 16.3 mos (95% CI 13.0-18.2 mos) respectively. In the subgroup of pts treated with So 1st TT followed by sunitinib (Su) 2nd TT (44 pts) and Su 1st TT followed by So 2nd TT (173 pts), median OS was 30.4 mos (95% CI 22.0-34.8 mos) and 16.6 mos (95% CI 13.1-18.2 mos) respectively. There were 269(76%) pts that received a total of 2 lines of therapy for mRCC, 133(38%) pts 3 lines and 43(12%) pts 4 lines of therapy. Conclusions: The efficacy and safety profile of So in the setting of Italian community-based daily clinical practice was similar to data reported in prospective clinical trials. The efficacy of So was observed in both the subgroups of pts receiving So as either the first or second TT for mRCC, with intriguing OS data in first line.