Aged 1 Article 1 Carcinoma 1 Chemoradiotherapy 1 Female 1 Follow-Up Studies 1 Head 1 Head and Neck Neoplasms 1 Head and neck neoplasms 1 Humans 1 Lung Neoplasms 1 Male 1 Mass Screening 1 Middle Aged 1 Neck 1 Neoplasm Recurrence, Local 1 Neoplasm recurrence 1 Retrospective Studies 1 Salvage Therapy 1 Salvage therapy Squamous Cell Carcinoma of Head and Neck 1 Squamous cell 1 Tomography 1 Tomography, X-Ray Computed 1 Treatment Outcome 1 X-ray computed 1 adult 1 aged 1 cancer patient 1 cancer radiotherapy 1