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CASE REPORT
Posterior semicircular canal dehiscence: a diagnostic and surgical conundrum
  1. Ajay Philip,
  2. Manju Deena Mammen,
  3. Anjali Lepcha and
  4. Anu Alex
  1. ENT Unit-4, Christian Medical College Vellore Association, Vellore, Tamil Nadu, India
  1. Correspondence to Dr Ajay Philip, ajayphilip81{at}gmail.com

Abstract

Third window defects have increasingly been identified as a cause of vertigo. These defects are bony dehiscences that occur in the bony labyrinth, resulting in abnormal pressure gradient in the inner ear fluids leading to sound (Tullio’s phenomenon) or pressure (Hennebert’s sign) induced vertigo. The superior semicircular canal dehiscence syndrome is a well-described entity in this regard, however defects of the posterior semicircular canal are rare and may have overlapping symptomatology. We describe the history, clinical profile and management of a patient who had importunate symptoms despite being on conservative management for a year and had resolution of vestibular symptoms following surgical management.

  • otolaryngology/ent
  • radiology
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Footnotes

  • Contributors AP: acquisition of data, drafting of manuscript and critical revision of manuscript for important intellectual content. MDM: acquisition of data and critical revision of manuscript for important intellectual content. AA: acquisition of data and drafting of manuscript. AL: acquisition of data and critical revision of manuscript for important intellectual content supervision.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.

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