It is usually associated with profound sensorineural hearing loss.
It most commonly results from an inflammatory process of the inner ear, but it can be associated with temporal bone trauma, temporal bones tumours or autoimmune inner ear disease.
High-density bone deposition within the membranous labyrinth:
- mild LO: hazy increase in density within fluid spaces of the membranous labyrinth
- moderate LO: focal areas of bony encroachment on fluid spaces of the membranous labyrinth
- severe LO: membranous labyrinth completely obliterated by bone replacing fluid spaces
- T2: may show low-intensity foci within high signal fluid of inner ear
Treatment and prognosis
It may complicate or preclude cochlear implantation.
Possible imaging differential considerations include:
- 1. Swartz JD, Mandell DM, Faerber EN et-al. Labyrinthine ossification: etiologies and CT findings. Radiology. 1985;157 (2): 395-8. Radiology (abstract) - Pubmed citation
- 2. AralaşMak A, DinçEr E, Arslan G et-al. Posttraumatic labyrinthitis ossificans with perilymphatic fistulization. Diagn Interv Radiol. 2009;15 (4): 239-41. doi:10.4261/1305-3825.DIR.1621-08.1 - Pubmed citation
- 3. Philippon D, Bergeron F, Ferron P et-al. Cochlear implantation in postmeningitic deafness. Otol. Neurotol. 2010;31 (1): 83-7. Pubmed citation
- 4. Harnsberger HR, MBBS CMG, Michel MA et-al. Diagnostic Imaging Head and Neck. Lippincott Williams & Wilkins. ISBN:1931884781. Read it at Google Books - Find it at Amazon
Inner ear pathology
inner ear anatomy
- enlarged vestibular aqueduct
- semicircular canal dysplasia
- classification of cochlear anomalies
- infection and inflammation
- trauma and miscellaneous