A Phase II Clinical Trial on Neo-adjuvant Pembrolizumab in Patients With pT3b-T4a/b cN0M0 Melanoma.

This study, called NeoSenti, is exploring whether giving one dose of the immunotherapy drug pembrolizumab before surgery can help the immune system fight melanoma more effectively. The study includes adults with high-risk melanoma who do not show any signs of the cancer having spread on scans. Participants receive a single infusion of pembrolizumab six weeks before their scheduled sentinel lymph node biopsy. The goal is to see if this early treatment can reduce or eliminate tiny cancer cells that might already be in the lymph nodes but are too small to detect. After surgery, patients whose melanoma stage normally requires further treatment will continue with standard immunotherapy for one year. Others will move directly into follow-up care. All participants are monitored closely for five years with regular scans, blood tests, and check-ups to watch for any signs of recurrence and to ensure their safety.