The goal of this proposed study is to establish a valid, clinically useful measurement battery for head and neck LEF by achieving these specific aims:
Aim 1: To determine the reliability and validity of the patient-reported outcome measure (LSIDS-H\&N) for assessing LEF-related symptoms in oral cavity and oropharyngeal cancer patients across the trajectory of treatment, recovery, and survival.
Aim 2: To determine the reliability and validity of the clinician-reported outcome measures (HN-LEF Grading Criteria and Modified Patterson Scale) for assessing external and internal LEF in oral cavity and oropharyngeal cancer patients across the trajectory of treatment, recovery, and survival.
Aim 3: To determine the reliability and validity of imaging techniques (CT scan and ultrasonography) in identifying site-specific LEF in oral cavity and oropharyngeal cancer patients across the trajectory of treatment, recovery, and survival.
