Effect of Radiation Therapy Among Head and Neck Cancer Patients on the Inner Ear Function

Inclusion Criteria: * Females and males, Age: ≥ 18 years old * Patients diagnosed Head and Neck cancers, not treated previously * Planned for radiation therapy in which the inner ear will be radiated Exclusion Criteria: * Patients who were previously diagnosed with a vestibular disorder * Previous middle or inner ear anomaly * Failure to complete the whole course of radiation therapy * More than one course of radiation therapy * Patients treated with concurrent ototoxic chemotherapy * Pregnant women * Patients who will not sign an informed consent form * Helpless or incompetent patients