The purpose of this research study is to see if it is possible to collect tissue, saliva and blood samples from patients who are having surgery and send those samples to different labs across MUSC. The researchers in these labs will collect tissue, blood and saliva samples before surgery and during surgery to see if there are any changes in the samples. They will compare the changes in the samples to the clinical outcomes.
This is a phase 1b/2, open-label, multicenter trial designed to look at the safety and efficacy of a study drug called SD 101 when injected into a tumor and used in combination with intravenous (IV) pembrolizumab in subjects with recurrent or metastatic head and neck squamous cell carcinoma (HNSCC). The Medical University of South Carolina will only participate in phase 2 of this study and will include up to 10 subjects. Participation in this study will include up to 40 visits to the research center over approximately 110 weeks.