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. * **Chapter 9: Nasopharynx (see code 1)** Used to stage for the following primary site descriptions: posterior wall of nasopharynx (NOS) * **Chapter 10 or 11: HPV-Mediated (p16+) Oropharyngeal Cancer or Oropharynx (p16-) (see code 2)** Oropharynx chapters are used for the following primary site descriptions. An additional schema discriminator will be used to distinguish between Chapter 10 and 11. Adenoid Pharyngeal tonsil


NAACCR #3926


Code Description Disease
1 Posterior wall of nasopharynx, NOS 9: Nasopharynx
2 Adenoid Pharyngeal tonsil Schema discriminator 2: Oropharyngeal p16
<BLANK> Primary Site is NOT C111, Discriminator is not necessary