The most common sites of head and neck cancer are the Larynx (including the supraglottis, glottis, and subglottis) Oral cavity (tongue, floor of mouth, hard palate, buccal mucosa, and alveolar ridges) Oropharynx (posterior and lateral pharyngeal walls, base of tongue, tonsils, and soft palate) Less common sites include the nasopharynx, nasal cavity and paranasal sinuses, hypopharynx, and salivary glands.