Case #11

CT

• LEFT
  • Normal appearance of the external and middle ear
  • Severe stenosis of the cochlear aperture
  • Mildly hypoplastic appearance of the apical turn
  • Incidental cochlear cleft
• RIGHT
  • Normal appearance of the external ear
  • Small amount of soft tissue attenuation material in Prussak’s space, in the sinus tympani, and along the posterior crus of the stapes without bony erosions
  • Normal appearance of the inner ear
  • Incidental cochlear cleft

MRI

• Normal appearance of the right IAC with all four nerves identified
• Absent left cochlear nerve. The left facial, superior vestibular, and inferior vestibular nerves are identified