Neuroradiology board review. This lecture is geared towards the ABR core exam for residents, but it would be useful for review for the ABR certifying exam or certificate of added qualification (CAQ) exam for neuroradiology.
This case is a mass in the right cerebellopontine angle and internal auditory canal. The differential for these masses includes schwannoma, meningioma, arachnoid cyst, and epidermoid. The key to differentiating this mass from others are that it is solid, centered in the internal auditory canal, and has a few areas of cystic degeneration or necrosis.
The diagnosis is: vestibular schwannoma
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