Hypotheses: We postulate that the CGA and the geriatric follow-up improves 1) the therapeutic decision-making process thanks to a better assessment of the patient's functional reserve and its capacity to support or not the treatment, and 2) the overall survival, the functional status and the nutritional status of elderly patients with HNSCC because of a more appropriate treatment and a personalized medical follow-up after surgery and/or radiotherapy and/or chemotherapy or more rarely targeted therapy, with adjustment of treatments and management of comorbidities and/or treatment complications.