J Neurol Surg B Skull Base 2022; 83(S 01): S1-S270
DOI: 10.1055/s-0042-1743819
Presentation Abstracts
Podium Abstracts

Superior Semicircular Canal Dehiscence Syndrome: The Ottawa Hospital Experience

Rafael Ochoa-Sanchez
1   The Ottawa Hospital Research Institute, Ottawa, Canada
,
Mazen Alotaibi
2   Division of Neurosurgery, Department of Surgery, The Ottawa Hospital, Ottawa, Canada
,
Shaun Kilty
1   The Ottawa Hospital Research Institute, Ottawa, Canada
,
Charles Agbi
2   Division of Neurosurgery, Department of Surgery, The Ottawa Hospital, Ottawa, Canada
,
Andre Lamothe
3   Department of Otolaryngology- Head & Neck Surgery, The Ottawa Hospital, Ottawa, Canada
,
David Schramm
1   The Ottawa Hospital Research Institute, Ottawa, Canada
,
Fahad Alkherayf
2   Division of Neurosurgery, Department of Surgery, The Ottawa Hospital, Ottawa, Canada
› Institutsangaben
› Weitere Informationen
Auch verfügbar aufMedOne
 
 

    Objective: Superior semicircular canal dehiscence (SSCD) syndrome has been defined as the absence of bone overlying the superior semicircular canal facing toward the dura of the middle cranial fossa. This bony defect creates a direct communication between the dura and labyrinthine membranous structure, leading to disruption of physiological pressure gradient within the membranous structures and acts as a mobile third window. SSCD patients present hyperacusis, autophony, disequilibrium, and sound- or pressure-induced vertigo. Apart from the avoidance of aggravating factors, there is no effective medical treatment for SSCD. Therefore, surgical management aims to eliminate the communication between the dura and inner ear structures either by reconstructing the skull base or sealing the bony defect over the petrous bone.

    Methods: We retrospectively review our experience in managing patients with SSCD with middle cranial fossa approach with six-layer reconstruction. Patients who were diagnosed with SSCD according to clinical symptoms, vestibular evoked myogenic potentials (VEMP), high-resolution CT scan, and had an audiology assessment were included in the study. In addition, postoperative clinical data, audiometry, and VEMP responses were collected and analyzed.

    Results: Twenty patients met the inclusion criteria for this study. 61% of the patients were female. Most of the patients (80%) showed alleviation of vestibular symptoms, whereas a small percentage of patients continued with complications including benign paroxysmal positional vertigo (5%). No sensorineural hearing loss, infections, or intracranial complications were reported and no patient required reoperation.

    Conclusion: Surgical repair of superior semicircular canal dehiscence through middle cranial fossa approach is highly effective for auditory and vestibular symptom improvement and is associated with relatively low complications.


     

    Die Autoren geben an, dass kein Interessenkonflikt besteht.

    Publikationsverlauf

    Artikel online veröffentlicht:
    15. Februar 2022

    © 2022. Thieme. All rights reserved.

    Georg Thieme Verlag KG
    Rüdigerstraße 14, 70469 Stuttgart, Germany