This value set includes codes based on the following rules:

• Include these codes as defined in http://sig.biostr.washington.edu/projects/fm/AboutFM.html

  Code	Display
  54993	torus of pharyngotympanic tube

• Include these codes as defined in http://snomed.info/sct

  Code	Display
  55940004	pharyngeal tonsil
  2095001	paranasal sinus
  31389004	oropharynx
  36360002	floor of mouth
  16811007	buccal mucosa
  119255006	supraglottis
  47975008	base of tongue
  48477009	lip
  21974007	tongue
  1849007	pharyngeal recess
  303337002	tonsil and adenoid
  81502006	hypopharynx
  38754007	alveolar process of mandible
  17861009	oropharyngeal tonsil
  385294005	salivary gland
  15924003	maxillary sinus
  6217003	pyriform sinus
  1307006	glottis
  2048000	lingual tonsil
  4596009	larynx
  26140008	uvula
  74262004	oral cavity
  91207004	pharyngotympanic tube
  75573002	palatine tonsil
  279549004	nasal cavity
  71836000	nasopharynx
  21058000	tubal tonsil
  85816001	retromolar trigone

• Include these codes as defined in http://www.nlm.nih.gov/research/umls

  Code	Display
  C0221297	unknown primary neoplasia site