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160 Malignant neoplasm of nasal cavities, middle ear, and accessory

           sinuses

160.0 Nasal cavities

          Cartilage of nose Septum of nose
          Conchae, nasal Vestibule of nose
          Internal nose
          Excludes: nasal bone (170.0)
           nose NOS (195.0)
           olfactory bulb (192.0)
           posterior margin of septum and choanae (147.3)
           skin of nose (172.3, 173.3)

160.1 Auditory tube, middle ear, and mastoid air cells

          Antrum tympanicum Tympanic cavity
          Eustachian tube
          Excludes: auricular canal (external) (172.2, 173.2)
           bone of ear (meatus) (170.0)
           cartilage of ear (171.0)
           ear (external) (skin) (172.2, 173.2)

160.2 Maxillary sinus

          Antrum (Highmore) (maxillary)

160.3 Ethmoidal sinus

160.4 Frontal sinus

160.5 Sphenoidal sinus

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

160.9 Accessory sinus, unspecified

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