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Age: 9

Sex: Female

Indication: Left-sided sensorineural hearing loss

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Case #13


Findings for this case

  • The vast majority of the left cochlea and vestibular apparatus are nonvisualized, with the exception of components of the vestibule and basal turn of the cochlea as well as the cochlear aperture
  • Symmetric size and contour of the left otic capsule, including the cochlear promontory, relative to the right side
  • Normal appearance of the left external and middle ear
  • Normal appearance of the right temporal bone


Images

The majority of the left cochlea is nearly invisible (red arrow) in contrast to the normal-appearing right cochlea. The cochlear promontories are symmetric and convex bilaterally (yellow arrows).

Diagnosis & Discussion

Diagnosis:

Labyrinthitis ossificans


Background

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Imaging Findings

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Differential

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Pearls

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