PMC9443604_01
Temporal bone axial CT scan showing contact of the cholesteatoma's capsule with sigmoid sinus and meninges.
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CEAC and requested a CT scan of temporal bones. CT scan showed erosion of the posterior wall of the EAC, mastoid involvement and exposure of the lateral sinus and meninges (Figure 1).
Transoperative picture of modified radical mastoidectomy showing intact TM and CEAC affecting the mastoid.
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Transoperative observation revealed erosion of the entire posterior wall of the EAC, except for a thin bone band close to the tympanic ring (Figure 2).