Schema Discriminator 1: Nasopharynx/PharyngealTonsil

This input is used for staging


**Note:** A schema discriminator is used to discriminate for primary site C111: Posterior wall of nasopharynx. Code the specific site in which the tumor arose. * **00090: Nasopharynx (see code 1)** Used to stage for the following primary site description: posterior wall of nasopharynx (NOS) * **00100 (HPV-Mediated (p16+)) or 00111 (Oropharyngeal Cancer or Oropharynx (p16-)) (see code 2)** Oropharynx Staging Systems are used for the following primary site descriptions. An additional schema discriminator will be used to distinguish between the AJCC HPV-Mediated (p16+) Oropharyngeal Cancer and Oropharynx (p16-) and Hypopharynx Staging System * Adenoid * Pharyngeal tonsil


NAACCR #3926


Code Description Schema ID #/Description
1 Posterior wall of nasopharynx, NOS 00090: Nasopharynx
2 Adenoid Pharyngeal tonsil 3927: Schema discriminator 2: Oropharyngeal p16
<BLANK> Primary Site is NOT C111, Discriminator is not necessary