 1. Male or Female, at least 18 years old, with primary symptoms of TD following surgery andor chemo- andor radiotherapy for treatment of squamous cell carcinoma for oropharyngeal cancer. Treatment must be completed at least 24 months prior to enrollment, with TD and disease-free status confirmed by medical history and clinical symptoms, including a focused head and neck examination evaluation, swallowing fluoroscopy, and high resolution pharyngeal manometry. 