ORIGINAL RESEARCH
Audiovestibular Findings in Superior Semicircular Canal Dehiscence Syndrome
Superior Semisirküler Kanal Dehissansı Sendromunda Odyovestibüler Bulgular
Received Date : 22 Aug 2022
Accepted Date : 26 Sep 2022
Available Online : 05 Oct 2022
Berna Deniz AYDINa, Hatice Seyra ERBEKb, Anı PARABAKAN POLATa, Evren HIZALa
aDepartment of Audiology, University of Health Sciences Gülhane Faculty of Health Sciences, Ankara, Türkiye
bDepartment of Otorhinolaryngology, Head and Neck Surgery, Başkent University Faculty of Medicine, Ankara, Türkiye
Doi: 10.24179/kbbbbc.2022-93010 - Makale Dili: EN
KBB ve BBC Dergisi. 2023;31(1):14-23
Copyright © 2020 by Turkey Association of Society of Ear Nose Throat and Head Neck Surgery. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
ABSTRACT
Objective: Superior semicircular canal dehiscence
(SSCD) is a rare syndrome caused by a bone defect in the superior semicircular
canal. The aim of this study was to evaluate the audiovestibular
clinical findings in patients diagnosed with SSCD syndrome.
Material and Methods: This study was designed as clinical retrospective
research. The archives of patients admitted to the otolaryngology
clinic between June 2018-June 2022 were examined. Records of
ears diagnosed with SSCD syndrome have been reached. The audiovestibular
symptoms, clinical findings, and high-resolution computed
tomography (HRCT) scans of these ears were presented. Results: As a
result of the retrospective evaluation, 5 ears diagnosed with SSCD
syndrome were obtained. Audiovestibular symptoms and clinical findings
such as pure tone audiometry, tympanometry, acoustic reflex,
video head impulse test, videonystagmography, cervical and ocular vestibular
evoked myogenic potentials (VEMP) test results were evaluated.
HRCT scans of all ears were interpreted. Conclusion: Symptoms such
as sound- and/or pressure-induced vertigo (Tullio phenomenon, Hennebert's
sign), oscillopsia, hyperacusis, autophony, pulsatile tinnitus,
aural fullness; findings such as elevated bone-conduction thresholds,
increasing of VEMP wave amplitude, decreasing of VEMP response
threshold, decreasing of semicircular canal gain suggestive of SSCD.
Keywords: Superior semicircular canal dehiscence syndrome; vestibular evoked myogenic potentials
ÖZET
Amaç: Superior semisirküler kanal dehissansı [superior semicircular
canal dehiscence (SSCD)], superior semisirküler kanaldaki
kemik defektinin neden olduğu nadir görülen bir sendromdur. Bu
çalışmanın amacı, SSCD sendromu tanısı alan hastalarda odyovestibüler
klinik bulguları değerlendirmektir. Gereç ve Yötemler: Bu
çalışma, klinik retrospektif araştırma olarak tasarlanmıştır. Haziran
2018-Haziran 2022 tarihleri arasında kulak-burun-boğaz kliniğine
başvuran hastaların kayıtları incelenmiştir. SSCD sendromu tanısı alan
hastaların verilerine ulaşılmıştır. Bu hastaların odyovestibüler
semptomları, klinik bulguları ve yüksek çözünürlüklü bilgisayarlı tomografi
[high-resolution computed tomography (HRCT)] taramaları
sunulmuÅŸtur. Bulgular: Retrospektif deÄŸerlendirme sonucunda, SSCD
sendromu tanısı alan 5 kulağa ulaşılmıştır. Bu 5 kulağın, odyovestibüler
semptomları ve saf ses odyometri, timpanometri, akustik refleks, video
head impulse test, videonistagmografi, servikal ve oküler vestibüler
uyarılmış miyojenik potansiyeller [vestibular evoked myogenic potentials
(VEMP)] test sonuçları gibi klinik bulguları değerlendirilmiştir.
Tüm kulakların HRCT taramaları yorumlanmıştır. Sonuç: Yüksek
şiddetli akustik uyaran (Tullio fenomeni) ve/veya basınçla (Hennebert
belirtisi) ortaya çıkan vertigo ve/veya nistagmus, osilopsi, hiperakuzi,
otofoni, kulakta dolgunluk hissi, pulsatil tinnitus gibi semptomlar; saf
ses odyometri testinde kemik eşiklerinin düşmesi, vestibüler uyarılmış
miyojenik potansiyeller testinde dalga amplitüdünün artması, VEMP
eşiklerinin düşmesi, video head impulse testte semisirküler kanal
kazançlarında azalma gibi bulgular SSCD sendromunu düşündürür.
Anahtar Kelimeler: Superior semisirküler kanal dehissansı sendromu; vestibüler uyarılmış miyojenik potansiyeller
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