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Temporal Bone Posterior Wall Defect, a New Clinic Entity?

Hande Ezerarslan1, Gökçe Kaan Ataç, Safinur Keskin

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|July 31, 2015
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Summary

Temporal bone posterior wall defects (TBPWD) are linked to increased tinnitus and vertigo. Defect size correlates with these symptoms, impacting audiological findings in affected patients.

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Area of Science:

  • Otolaryngology
  • Neurosurgery
  • Radiology

Background:

  • Temporal bone posterior wall defects (TBPWD) are rare congenital or acquired anomalies.
  • Understanding their clinical and audiological impact is crucial for patient management.

Purpose of the Study:

  • To define the clinical and audiological characteristics of patients with TBPWD.
  • To explore the relationship between TBPWD size and associated symptoms.

Main Methods:

  • Retrospective analysis of CT scans for 1198 patients with vestibulocochlear symptoms.
  • Clinical and audiological evaluations (audiometry, tympanometry, otoacoustic emissions) for patients with identified TBPWD.

Main Results:

  • TBPWD identified in 2.34% of patients; 23 eligible for study.
  • Defect size significantly correlated with tinnitus and vertigo (p<0.005).
  • Audiological tests revealed mixed, sensorineural, and conductive hearing loss, with significant otoacoustic emission differences.

Conclusions:

  • This study provides the first definition of clinical and audiological findings in TBPWD.
  • TBPWD are associated with a higher prevalence of vertigo and tinnitus.
  • These defects negatively impact audiological characteristics.