This clinical trial is focused on studying treatments for a type of skin cancer known as melanoma, specifically in cases where the cancer has not responded to previous treatments targeting a protein called PD-1. The study will explore the safety and effectiveness of different treatment combinations, including the use of pembrolizumab, also known as Keytruda, either alone or in combination with other investigational drugs. These investigational drugs include vibostolimab (MK-7684), lenvatinib (MK-7902), quavonlimab (MK-1308), and tretinoin. Pembrolizumab is administered as a solution for infusion, while lenvatinib and tretinoin are taken orally in capsule form.
The purpose of the study is to assess how safe and tolerable these treatment combinations are for participants, as well as to evaluate how well the treatments work in reducing the size of the tumors. Participants will receive these treatments over a period of time, and their health will be closely monitored to identify any side effects or improvements in their condition. The study will also include a group of participants who will receive a placebo to compare the effects of the investigational treatments.
Throughout the study, participants will undergo regular health assessments to track their response to the treatments. The study aims to provide valuable information on new potential treatment options for patients with melanoma that has not responded to existing therapies. This research could lead to improved treatment strategies for managing this challenging form of skin cancer.



France
Italy