Long-term Safety and Efficacy Extension Study for Participants With Advanced Tumours Who Are Currently on Treatment or in Follow-up in a Pembrolizumab Study

The purpose of this study is to evaluate the long-term safety and efficacy of pembrolizumab (MK-3475) in participants from previous Merck pembrolizumab-based parent studies who roll-over into this extension study. This study will consist of three phases: 1) First Course Phase, 2) Survival Follow-up Phase or 3) Second Course Phase. Each participant will roll-over to … Continued