Labyrinthitis ossificans

Case contributed by Dr Bruno Costa Gomes

Presentation

25 year old male presenting with bilateral sensorineural hearing loss after a meningococcal meningitis at 6 years of age.

Patient Data

Age: 25
Gender: Male
Modality: CT

CT scan shows significant reduction of the permeability of both lateral semicircular canals and also of the superior and posterior left semicircular canals.

This represents osseous deposition within the fluid spaces of the membranous labyrinth.

There is no evident involvement of the vestibule or of the cochlea.

Modality: MRI

MR study reveals absence of the normal T2 high signal of the fluid spaces of the membranous labyrinth in the lateral semicircular canals and in the left superior semicircular canal. There is also a similar appearance in most part of the left posterior semicircular canal.

These findings are in accordance to the previous CT scan.

Case Discussion

Labyrinthine ossificans occurs as the result of a healing reaction, and generally occurs secondary to an inflammatory process such as infection (as is the case here), but may be the result of traumatic or tumorous processes. This process leads to a sensorineural hearing loss, and may prevent or complicate cochlear implantation

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Case Information

rID: 21732
Case created: 14th Feb 2013
Last edited: 9th Oct 2016
System: Head & Neck
Inclusion in quiz mode: Included

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