_OBJECTIVES_: To adopt a newly designed scoring/staging system for of tympanomastoid cholesteatoma similar to cancer staging protocols. _METHODS_: Our system relied on clinical, CT findings, and confirmed with intraoperative findings. All bony items that could be affected by cholesteatoma were scored, including: scutum (S), ossicles (O), mastoid (M), posterior canal wall (C), lateral sinus plate (L), inner ear (E), facial ...
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