{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T10:19:19Z","timestamp":1787825959920,"version":"build-2784847793"},"reference-count":41,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T00:00:00Z","timestamp":1787788800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T00:00:00Z","timestamp":1787788800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["The Laryngoscope"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>Radiologic superior semicircular canal dehiscence (SSCD) is not an uncommon finding, while many patients remain asymptomatic. We aimed to highlight minor head trauma as a risk factor for evolution into a clinically significant SSCD syndrome and provide the audiovestibular findings.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A retrospective chart review study in a tertiary referral medical center was conducted. Patients were identified from the Province of Ontario Workplace Safety and Insurance Board database, 1998\u20132025. Each patient underwent a comprehensive assessment comprising history, physical examination, audiovestibular testing, and CT to confirm radiological dehiscence.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Twelve patients were identified. Median age was 41\u2009years (Interquartile range 38\u201348). The most common mechanism of injury was a fall. Direction of impact was primarily temporal. Three patients suffered a contrecoup injury pattern. All patients sustained an immediate hearing loss. Immediate autophony was reported in 10 patients. A Tullio phenomenon was reported in six cases. Hennebert sign and bone conduction hyperacusis were found in 8 and 7 patients, respectively. Pure tone audiometry showed classic low\u2010frequency bone conduction supra\u2010thresholds with mild to moderate air conduction hearing loss in 7 patients. When tested, vHIT showed a unilateral relative reduction in gain of the superior semicircular canal in all cases when compared to the contralateral SSC (average mean of 0.81 vs. 0.92,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001). Average SP\/AP ratios were significantly higher among the SSCD ears compared to contralateral controls (0.40 vs. 0.19, respectively,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.001).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Seemingly mild head trauma may be enough to convert anatomically predisposed patients into a clinically symptomatic SSCD syndrome.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>4.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/lary.70856","type":"journal-article","created":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T09:35:37Z","timestamp":1787823337000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Head Trauma\u2010Induced Superior Semicircular Canal Dehiscence Syndrome"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5904-1291","authenticated-orcid":false,"given":"Omer J.","family":"Ungar","sequence":"first","affiliation":[{"name":"Division of Otology\/Neurotology, Department of Otolaryngology\u2010Head and Neck Surgery Toronto General Hospital, University Health Network  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4284-9793","authenticated-orcid":false,"given":"Ross","family":"O'Shea","sequence":"additional","affiliation":[{"name":"Division of Otology\/Neurotology, Department of Otolaryngology\u2010Head and Neck Surgery Toronto General Hospital, University Health Network  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John A.","family":"Rutka","sequence":"additional","affiliation":[{"name":"Division of Otology\/Neurotology, Department of Otolaryngology\u2010Head and Neck Surgery Toronto General Hospital, University Health Network  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,8,27]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"crossref","first-page":"1717","DOI":"10.1097\/01.mlg.0000178324.55729.b7","article-title":"Clinical Manifestations of Superior Semicircular Canal Dehiscence","volume":"115","author":"Minor L. B.","year":"2005","journal-title":"Laryngoscope"},{"key":"e_1_2_11_3_1","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/S0196-0709(00)80068-X","article-title":"Superior Canal Dehiscence Syndrome","volume":"21","author":"Minor L. B.","year":"2000","journal-title":"American Journal of Otology"},{"key":"e_1_2_11_4_1","doi-asserted-by":"crossref","first-page":"722","DOI":"10.1212\/WNL.54.3.722","article-title":"Vestibular Hypersensitivity to Sound (Tullio Phenomenon): Structural and Functional Assessment","volume":"54","author":"Watson S. R.","year":"2000","journal-title":"Neurology"},{"key":"e_1_2_11_5_1","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1097\/00129492-200403000-00007","article-title":"Superior Semicircular Canal Dehiscence Presenting as Conductive Hearing Loss Without Vertigo","volume":"25","author":"Mikulec A. A.","year":"2004","journal-title":"Otology & Neurotology"},{"key":"e_1_2_11_6_1","doi-asserted-by":"crossref","first-page":"1383","DOI":"10.1097\/MAO.0000000000000811","article-title":"Pediatric Semicircular Canal Dehiscence: Radiographic and Histologic Prevalence, With Clinical Correla Tion","volume":"36","author":"Meiklejohn D. A.","year":"2015","journal-title":"Otology & Neurotology"},{"key":"e_1_2_11_7_1","doi-asserted-by":"crossref","first-page":"947","DOI":"10.3174\/ajnr.A2437","article-title":"Superior Semicircular Canal Dehiscence: Congenital or Acquired Condition?","volume":"32","author":"Nadgir R. N.","year":"2011","journal-title":"American Journal of Neuroradiology"},{"key":"e_1_2_11_8_1","doi-asserted-by":"crossref","first-page":"1245","DOI":"10.1097\/MAO.0b013e3182634e27","article-title":"Radiographic Evaluation of the Tegmen in Patients With Superior Semicircular Canal Dehiscence","volume":"33","author":"Nadaraja G. 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A.","year":"2014","journal-title":"Case Reports in Otolaryngology"},{"key":"e_1_2_11_11_1","doi-asserted-by":"crossref","DOI":"10.1093\/jscr\/rjaa592","article-title":"Traumatic Superior Semicircular Canal Dehiscence Syndrome: Case Report and Literature Review","volume":"2021","author":"Aladham Y.","year":"2021","journal-title":"Journal of Surgical Case Reports"},{"issue":"11","key":"e_1_2_11_12_1","doi-asserted-by":"crossref","first-page":"E2810","DOI":"10.1002\/lary.29751","article-title":"Superior Semicircular Canal Dehiscence Syndrome Following Head Trauma: A Multi\u2010Institutional Review","volume":"131","author":"McCrary H. 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K.","year":"2021","journal-title":"Journal of Vestibular Research"},{"issue":"1","key":"e_1_2_11_14_1","doi-asserted-by":"crossref","first-page":"142","DOI":"10.1177\/0194599813489494","article-title":"An Indicator of Probable Semicircular Canal Dehiscence: Ocular Vestibular Evoked Myogenic Potentials to High Frequencies","volume":"149","author":"Manzari L.","year":"2013","journal-title":"Otolaryngology\u2013Head and Neck Surgery"},{"key":"e_1_2_11_15_1","doi-asserted-by":"crossref","DOI":"10.3389\/fneur.2020.00695","article-title":"Vestibular Evoked Myogenic Potential (VEMP) Testing for Diagnosis of Superior Semicircular Canal Dehiscence","volume":"11","author":"Noij K. S.","year":"2020","journal-title":"Frontiers in Neurology"},{"issue":"3","key":"e_1_2_11_16_1","doi-asserted-by":"crossref","first-page":"452","DOI":"10.3390\/audiolres11030042","article-title":"Investigating Performance of cVEMP and oVEMP in the Identification of Superior Canal Dehiscence in Relation to Dehiscence Location and Size","volume":"11","author":"Maheu M.","year":"2021","journal-title":"Audiology Research"},{"issue":"2","key":"e_1_2_11_17_1","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1097\/MAO.0b013e318241c23b","article-title":"Multislice Computed Tomography in the Diagnosis of Superior Canal Dehiscence: How Much Error, and How to Minimize It?","volume":"33","author":"Tavassolie T. 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A.","year":"2015","journal-title":"Frontiers in Neurology"},{"key":"e_1_2_11_20_1","doi-asserted-by":"crossref","first-page":"1683","DOI":"10.3174\/ajnr.A8691","article-title":"Outcomes of Radiologist Recommendations for Temporal Bone CT to Assess Superior Semicircular Canal Dehiscence on Temporal Bone MRI","volume":"46","author":"Rabiei P.","year":"2025","journal-title":"American Journal of Neuroradiology"},{"issue":"7","key":"e_1_2_11_21_1","doi-asserted-by":"crossref","first-page":"1421","DOI":"10.3174\/ajnr.A3459","article-title":"Can MRI Replace CT in Evaluating Semicircular Canal Dehiscence?","volume":"34","author":"Browaeys P.","year":"2013","journal-title":"American Journal of Neuroradiology"},{"key":"e_1_2_11_22_1","doi-asserted-by":"crossref","first-page":"938","DOI":"10.1148\/radiol.2382042098","article-title":"Superiorsemicircular Canal Dehiscence: Oblique Reformatted CT Images for Diagnosis","volume":"238","author":"Branstetter B. F.","year":"2006","journal-title":"Radiology"},{"key":"e_1_2_11_23_1","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1097\/MAO.0000000000004588","article-title":"Superior Semicircular Canal Dehiscence in the General Population With Otosclerosis: A Meta\u2010Analysis","volume":"46","author":"Ungar O. J.","year":"2025","journal-title":"Otology & Neurotology"},{"issue":"2","key":"e_1_2_11_24_1","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1016\/j.ejrad.2009.05.038","article-title":"Anatomo\u2010Radiological Study of the Superior Semicircular Canal Dehiscence: Radiological Considerations of Superior and Posterior Semicircular Canals","volume":"76","author":"Crovetto M.","year":"2010","journal-title":"European Journal of Radiology"},{"issue":"2","key":"e_1_2_11_25_1","doi-asserted-by":"crossref","first-page":"137","DOI":"10.1001\/archotol.126.2.137","article-title":"Dehiscence or Thinning of Bone Overlying the Superior Semicircular Canal in a Temporal Bone Survey","volume":"126","author":"Carey J. P.","year":"2000","journal-title":"Archives of Otolaryngology \u2013 Head & Neck Surgery"},{"issue":"2","key":"e_1_2_11_26_1","doi-asserted-by":"crossref","first-page":"337","DOI":"10.1148\/radiol.2262010897","article-title":"CT Evaluation of Bone Dehiscence of the Superior Semicircular Canal as a Cause of Sound\u2010and\/or Pressure\u2010Induced Vertigo","volume":"226","author":"Belden C. J.","year":"2003","journal-title":"Radiology"},{"issue":"4","key":"e_1_2_11_27_1","doi-asserted-by":"crossref","first-page":"428","DOI":"10.1017\/S0022215109991654","article-title":"Latent Superior Canal Dehiscence Syndrome Unmasked by Stapedotomy for Otosclerosis","volume":"124","author":"Hope A.","year":"2010","journal-title":"Journal of Laryngology & Otology"},{"issue":"5","key":"e_1_2_11_28_1","doi-asserted-by":"crossref","first-page":"481","DOI":"10.1016\/S0194-59980301391-3","article-title":"Coronal Computed Tomography Prevalence of Superior Semicircular Canal Dehiscence","volume":"129","author":"Williamson R. A.","year":"2003","journal-title":"Otolaryngology\u2013Head and Neck Surgery"},{"issue":"4","key":"e_1_2_11_29_1","first-page":"709","article-title":"Prevalence of Superior Semicircular Canal Dehiscence on High\u2010Resolution CT Imaging in Patients Without Vestibular or Auditory Abnormalities","volume":"40","author":"Berning A. W.","year":"2019","journal-title":"American Journal of Neuroradiology"},{"issue":"22","key":"e_1_2_11_30_1","doi-asserted-by":"crossref","DOI":"10.3390\/jcm14228054","article-title":"Spontaneous SSCD Auto\u2010Plugging: Clinical, Electrophysiological and Radiological Evidence","volume":"14","author":"Reynard P.","year":"2025","journal-title":"Journal of Clinical Medicine"},{"issue":"12","key":"e_1_2_11_31_1","doi-asserted-by":"crossref","first-page":"1925","DOI":"10.1016\/j.ijporl.2007.08.009","article-title":"Superior Semicircular Canal Dehiscence in a Young Child: Implication of Developmental Defect","volume":"71","author":"Zhou G.","year":"2007","journal-title":"International Journal of Pediatric Otorhinolaryngology"},{"issue":"4","key":"e_1_2_11_32_1","doi-asserted-by":"crossref","first-page":"477","DOI":"10.1080\/0036554021000028099","article-title":"High\u2010Resolution CT Findings Suggest a Developmental Abnormality Underlying Superior Canal Dehiscence Syndrome","volume":"123","author":"Hirvonen T. P.","year":"2003","journal-title":"Acta Oto\u2010Laryngologica"},{"issue":"4","key":"e_1_2_11_33_1","doi-asserted-by":"crossref","first-page":"591","DOI":"10.1097\/MAO.0b013e31824bae10","article-title":"Spontaneous Tegmen Defect and Semicircular Canal Dehiscence: Same Etiopathogenic Entity?","volume":"33","author":"El Hadi T.","year":"2012","journal-title":"Otology & Neurotology"},{"issue":"3","key":"e_1_2_11_34_1","doi-asserted-by":"crossref","first-page":"551","DOI":"10.1097\/MAO.0000000000000555","article-title":"The Correlation Between Obesity, Obstructive Sleep Apnea, and Superior Semicircular Canal Dehiscence: A New Explanation for an Increasingly Common Problem","volume":"36","author":"Schutt C. A.","year":"2015","journal-title":"Otology & Neurotology"},{"issue":"6","key":"e_1_2_11_35_1","doi-asserted-by":"crossref","first-page":"1120","DOI":"10.1177\/0194599812457545","article-title":"Superior Semicircular Canal Dehiscence in Patients With Spontaneous Cerebrospinal Fluid Otorrhea","volume":"147","author":"Allen K. P.","year":"2012","journal-title":"Otolaryngology\u2013Head and Neck Surgery"},{"issue":"6","key":"e_1_2_11_36_1","doi-asserted-by":"crossref","first-page":"797","DOI":"10.1097\/MAO.0000000000001814","article-title":"Clinical Implications of the Association Between Temporal Bone Tegmen Defects and Superior Semicircular Canal Dehiscence","volume":"39","author":"Handzel O.","year":"2018","journal-title":"Otology & Neurotology"},{"issue":"3","key":"e_1_2_11_37_1","doi-asserted-by":"crossref","first-page":"481","DOI":"10.1097\/MAO.0000000000000552","article-title":"Calvarium Thinning in Patients With Spontaneous Cerebrospinal Fluid Leak","volume":"36","author":"Nelson R. F.","year":"2015","journal-title":"Otology & Neurotology"},{"issue":"2","key":"e_1_2_11_38_1","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1001\/archfaci.4.2.98","article-title":"Orbital Blowout Fractures: Experimental Evidence for the Pure Hydraulic Theory","volume":"4","author":"Rhee J. S.","year":"2002","journal-title":"Archives of Facial Plastic Surgery"},{"issue":"2","key":"e_1_2_11_39_1","doi-asserted-by":"crossref","first-page":"123","DOI":"10.28920\/dhm47.2.123-126","article-title":"Superior Canal Dehiscence Syndrome Associated With Scuba Diving","volume":"47","author":"Kitajima N.","year":"2017","journal-title":"Diving and Hyperbaric Medicine"},{"issue":"1","key":"e_1_2_11_40_1","doi-asserted-by":"crossref","first-page":"e60","DOI":"10.1097\/MAO.0b013e31829c1125","article-title":"Pneumocephalus, Hearing Loss, and Vertigo After Airline Flight in a Patient With Superior Canal Dehiscence","volume":"35","author":"Remenschneider A.","year":"2014","journal-title":"Otology & Neurotology"},{"issue":"1","key":"e_1_2_11_41_1","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1002\/ohn.697","article-title":"Traumatic Events Preceding the Development of Superior Canal Dehiscence Syndrome","volume":"171","author":"Formeister E. J.","year":"2024","journal-title":"Otolaryngology\u2013Head and Neck Surgery"},{"key":"e_1_2_11_42_1","first-page":"10","article-title":"Risk Factors and Preceding Events Predisposing the Development of Superior Canal Dehiscence Syndrome","volume":"47","author":"Wei O.","year":"2025","journal-title":"Otology & Neurotology"}],"container-title":["The Laryngoscope"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/lary.70856","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/lary.70856","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/lary.70856","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T09:35:41Z","timestamp":1787823341000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/lary.70856"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,27]]},"references-count":41,"alternative-id":["10.1002\/lary.70856"],"URL":"https:\/\/doi.org\/10.1002\/lary.70856","archive":["Portico"],"relation":{},"ISSN":["0023-852X","1531-4995"],"issn-type":[{"value":"0023-852X","type":"print"},{"value":"1531-4995","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,27]]},"assertion":[{"value":"2026-04-21","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-12","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-27","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"lary.70856"}}