General Concepts in Head and Neck Radiotherapy: Patient Preparation -- Simulation -- Treatment Planning -- Follow-up during Radiotherapy -- Follow-up After Radiotherapy -- Management of Neck -- Systemic therapies in the management of Head and Neck Cancers -- Orbital Tumors -- Ear Tumors -- Paranasal Sinus and Nasal Cavity Tumors -- Nasopharyngeal Cancers -- Oropharyngeal Cancers -- Hypopharyngeal Cancers -- Laryngeal Cancers -- Oral Cavity Cancers -- Salivary -- Neck Metastases of Unknown Primary -- Rare Tumors of Head and Neck Region.