Legend Axial CT of the temporal bones demonstrates enlargement of the bilateral bony vestibular aqueducts. Note that the vestibular aqueducts are larger than the adjacent posterior semicircular canals.

Legend Axial and sagittal (lower right) heavily T2 weighted MRI (3D CISS or FIESTA) demonstrates a large endolymphatic sac along the dura of the posterior fossa. Key words: ct mri temporal bone inner ear

ENT Diagnosis: Vestibular aqueduct syndrome - Endolymphatic hydrops