Labyrithitis ossificans

Case contributed by Dr Badis Al Harbawi


Right-sided sensorineural hearing loss.

Patient Data

Age: 50 years
Gender: Male

There is non-visualization of the right semicircular canals apart from a small part of the superior semicircular canal due to osseous deposition. There are also faint areas of ossification seen in the right cochlear turns mainly basal turn. 

The mastoid air cells and middle ear cavities are clear. Intact ossicles. Normal internal auditory canals, vestibules, left cochlea and left semicircular canals.No evidence of bony destruction or temporal bone tumor. 

Case Discussion

Findings, in this case, represent typical CT scan findings of a rather severe form of labyrinthitis ossificans. MRI was not done in this case, which could further illustrate the obliteration of the semicircular canal and to a lesser extent cochlea.

Causes include:

Inflammatory process/previous inner ear infection.

Temporal bone trauma

Autoimmune disease.

Temporal bone tumors. 

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Case information

rID: 68283
Published: 28th May 2019
Last edited: 28th May 2019
System: Head & Neck
Inclusion in quiz mode: Included
Institution: Ibn Al Haitham hospital

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