 To address this problem, winvestigators hypothesize that the quantitative and validated patient-reported outcome PRO instrument, the Sydney Swallow Questionnaire SSQ, can be an effective tool to longitudinally measure swallow function to determine the natural history of head and neck cancer treatment-related swallow dysphagia. The SSQ is particularly well suited for longitudinal evaluation of swallow function as it quantifies various aspect of patient-perceived swallow function in contrast to other swallow PROs that measure the impact of swallow function on quality of life domains. To determine the two-year prevalence of dysphagia, investigators will employ a multi-institution prospective study design using our Oncospace web-portal to facilitate secure prospective data curation and analysis that will include evaluations before, during and following standard of care definitive cancer treatment for a total of 36 months in the follow-up period. 