Staging of Head and neck cancers follows the Tumor/Node/Metastasis (TNM) staging criteria by the American Joint Committee on Cancer (AJCC) or the International Union for Cancer Control (UICC) and are classified according to the primary site of the tumor: Nasopharynx, oral cavity, oropharynx, hypopharynx, larynx, and sinuses.

https://cancerstaging.org/references-tools/deskreferences/Documents/AJCC6thEdCancerStagingManualPart1.pdf