Coronal CT bone windows

Findings: Soft tissue mass (a) occupying Prussack's space (between the malleolar head and the lateral wall of the attic) on the right, eroding the scutum (s) and pushing the ossicles (os) medially. Epitympanum (epi). Horizontal semicircular canal (hscc). Vestibule (vest). Internal auditory canal (iac). Basal turn of the cochlea (btc). Hypotympanum (hypo). Tympanic membrane (tm). Common crus (cc).