Ipilimumab (Ipi) Retreatment At 10 Mg/Kg In Patients With Metastatic Melanoma Previously Treated In Phase Ii Trials

9059 Background: Ipi is a fully human monoclonal antibody that binds to cytotoxic T-lymphocyte antigen-4 to augment antitumor immune responses. In phase III study MDX010-20, where patients (pts) could be retreated if they met safety criteria and achieved an objective response or stable disease ≥3 months from the end of the induction period (q3 weeks for 4 doses), 21 of 31 pts (68%) retreated with Ipi reestablished disease control. CA184-025 is a roll-over study of extended Ipi treatment or survival follow-up in pts who received Ipi in phase II trials, with the primary objective of evaluating safety during extended treatment. We report the safety profile in pts retreated with Ipi in study 025. Methods: Eligible pts in phase II trials CA184-004, -007, -008, -022, MDX010-08, or -015 were enrolled in study 025 (N=248) to receive retreatment (at the time of progression), extended maintenance (if no prior progression), or survival follow-up only. Pts were ineligible for retreatment if they had experienced a gra...