160.1 Auditory tube, middle ear, and mastoid air cells
Antrum tympanicum
Eustachian tube
Tympanic cavity
Excludes: malignant melanoma of:
auditory canal (external) (172.2)
ear (external) (skin) (172.2)
malignant neoplasm of:
auditory canal (external) (173.20-173.29)
bone of ear (meatus) (170.0)
cartilage of ear (171.0)
ear (external) (skin) (173.20-173.29)
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