Acute unilateral hearing loss. No dizziness on presentation.
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The axial 3D CISS sequence reveals a hypointense filling defect within the basal turn of the cochlea, replacing the normal hyperintense CSF signal intensity, represents the intracochlear schwannoma.
The axial enhanced T1-weighted sequence at the level of the cochlea reveals a homogeneously enhancing mass in the basal turn of the cochlea (arrow) representing the intracochlear schwannoma.
Histology obtained during surgery after the tumor grew, confirmed an intracochlear schwannoma.