Treatment of metastatic renal cancer with high-dose interleukin-2 after targeted therapy.

439 Background: High-Dose Interleukin-2 (HD IL2) remains a good option for treatment of metastatic renal cancer. As a first-line treatment, in carefully selected patients, it can produce high rates of response ( OR 50%; CR 25%) (Shablak A et al., J Immunotherapy 2011, 34(1):107-122). Its use after targeted therapies is controversial and there are reports of increased toxicity, particularly an increased incidence of cardiovascular toxicity (and possibly a reduced response rate (Cho DC et al., J Immunotherapy 2009, 32(2):181-520). However, there is potential to use it either in patients who have failed treatment with targeted therapy or as a consolidation therapy after successful treatment with a targeted agent. Methods: Here we present the outcomes of 16 patients treated with first-line immunotherapy with HD-IL2 after targeted therapy: of these 8 had been treated after failure of 1-3 lines of targeted therapy and 8 have been treated as consolidation after initial response to sunitinib. The histological cha...