RecruitingProcedureSentinel Lymph Node Biopsy for Cutaneous Squamous Cell Carcinoma of the Head and NeckThe purpose of this study is to research if a type of biopsy known as sentinel lymph node biopsy (SLNB) can help in determining the rate of tumor deposits that are hard to detect and identify in node-negative cutaneous squamous cell carcinoma of the head or neck.