Presentation
Unilateral hearing loss.
Patient Data
Age: Adult
From the case:
Cholesteatoma
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Coronal bone window

Soft tissue attenuation region in left middle ear cavity, expanding the Prussak space, eroding scutum and ear ossicles, extending into mastoid.
Case Discussion
The patient went on to have a resection.
Histology:
Fragments of keratin debris and benign squamous epithelium, consistent with cholesteatoma.