 Cancers located in the upper aerodigestive tract of the head and neck region present unique management challenges due to the crucial functions in this anatomic region along with its anatomic density. As such, cancers themselves and the actual treatment can affect these functions. Of these, the ability to effectively and safely transport a swallow bolus from the oral cavity to the esophagus is particularly important. This consideration has in fact been a major source of debate regarding the optimal management for head and neck cancers as both oncologic-effective and function-preserving therapies are desired. Accomplishing this therapeutic goal has been elusive and can be attributed to a lack of tools that effectively and longitudinally evaluate swallow function over the course of a treatment and in follow-up. As such, investigators surprisingly lack a clear understanding of the natural history of treatment -related swallow dysfunction dysphagia regardless of the treatment modality. As such, understanding the prevalence of this significant complication is in fact not well established. Understanding the true prevalence of treatment-related dysphagia is in fact critical to establish as it will help guide decisions as to whether or not treatment strategies require modification including de-intensification of treatment that is receiving considerable attention for favourable prognosis patients associated with the human papillomavirus HPV. 