An illustration showing possible cancer sites in different regions of the head and neck.
- The following sites are part of the oral cavity: the mucosa of the lip (not the external, dry lip), floor of the mouth, oral tongue, alveolar ridge, retromolar trigone, hard palate, and buccal mucosa.
- The following sites are part of the oropharynx: the soft palate, tonsil, posterior and lateral pharyngeal walls, and base of the tongue.
- The following sites are part of the hypopharynx: the pyriform fossa, lateral and posterior hypopharyngeal walls, and postcricoid region.
- The following sites are part of the larynx: the supraglottic, glottic, and subglottic larynx.
