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146 Malignant neoplasm of oropharynx

146.0 Tonsil

          Tonsil:
           NOS
           faucial
           palatine
          Excludes: lingual tonsil (141.6)
           pharyngeal tonsil (147.1)

146.1 Tonsillar fossa

146.2 Tonsillar pillars (anterior) (posterior)

          Palatoglossal arch
          Palatopharyngeal arch

146.3 Vallecula

          Anterior and medial surface of the pharyngoepiglottic fold

146.4 Anterior aspect of epiglottis

          Epiglottis, free border [margin]
          Glossoepiglottic fold(s)
          Excludes: epiglottis:
           NOS (161.1)
           suprahyoid portion (161.1)

146.5 Junctional region

          Junction of the free margin of the epiglottis, the aryepiglottic fold, and
           the pharyngoepiglottic fold

146.6 Lateral wall of oropharynx

146.7 Posterior wall of oropharynx

146.8 Other [see Note 3 at beginning of Chapter II]

146.9 Oropharynx, unspecified

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