Superior Semicircular Canal Dehiscence

Bhatt, Alok A.; Lundy, Larry; Middlebrooks, Erik H.; Vibhute, Prasanna; Gupta, Vivek; Rhyner, Patricia A.

doi:10.1007/s00062-021-01037-x

Cited by 4 publications

(12 citation statements)

References 43 publications

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“…This latter method seals the defect and preserves the physiologic function of the semicircular canal. 2,3 Most patients have significant improvement or resolution of symptoms after cartilage cap placement surgery and therefore, undergo no further imaging. As a result, very little is reported in literature about the post-operative appearance of SSCD resurfacing and is an inherent limitation of this study; clinical concern for rare complications such as fistula or pneumolabyrinth may prompt CT examination.…”

Section: Discussionmentioning

confidence: 99%

“…This latter method seals the defect and preserves the physiologic function of the semicircular canal. 2,3…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, conchal or tragal cartilage cap resurfacing seals the defect and preserves, anatomically and functionally, the superior semicircular canal. 2,3 Most patients have significant improvement or resolution of symptoms after cartilage cap placement surgery and no further imaging is necessary. 3 Clinical concern for rare complications such as fistula or pneumolabyrinth may prompt computed tomography (CT) evaluation.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, conchal or tragal cartilage cap resurfacing seals the defect and preserves, anatomically and functionally, the superior semicircular canal. 2,3…”

Section: Introductionmentioning

confidence: 99%

“…Patients may also present with conductive hearing loss, autophony, pulsatile tinnitus, and hyperacusis. 2 Most symptomatic patients with SSCD can be treated conservatively. Those with debilitating symptoms may be considered for surgery.…”

Section: Introductionmentioning

confidence: 99%

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New bone formation over dehiscent semicircular canal with cartilage cap

et al. 2022

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Purpose Cartilage cap resurfacing is a method to seal a superior semicircular canal dehiscence. The purpose of this study was to evaluate the detection of new bone formation after surgical placement of a cartilage cap over a dehiscent semicircular canal. Methods In this retrospective review, two neuroradiologists blinded to each other’s interpretation reviewed the temporal bones of 20 patients, five of which had a pre-operative computed tomography (CT) exam which was interpreted as unilateral superior semicircular canal dehiscence and with new bone formation following repair on follow-up CT. There were also 15 control subjects. Each neuroradiologist was blinded to history, including post-operative changes, and asked to determine if there was a dehiscence or no dehiscence. Results Out of the 15 controls, there was 100% inter-observer agreement. On the five post-operative patients, there was agreement in 4/5 that there was no dehiscence post-operatively and 1/5 agreement of dehiscence post-operatively, but ectopic bone adjacent to the dehiscence. Conclusion Our results indicate that new bone formation can be seen at the site of cartilage cap placement over the dehiscence and be interpreted as bony closure of the dehiscence.

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Section: Discussionmentioning

confidence: 99%

“…This latter method seals the defect and preserves the physiologic function of the semicircular canal. 2,3…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…On the other hand, conchal or tragal cartilage cap resurfacing seals the defect and preserves, anatomically and functionally, the superior semicircular canal. 2,3…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New bone formation over dehiscent semicircular canal with cartilage cap

et al. 2022

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Supralabyrinthine air cell is not present in superior semicircular canal dehiscence

Bhatt

Lundy

Rhyner

2022

JCIS

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Objectives: Superior semicircular canal dehiscence (SSCD) is defined as a defect in the bone overly the superior semicircular canal (SSC). The purpose of this study is to evaluate the pre-operative imaging examinations of patients who have undergone SSCD repair. We hypothesize that these patients will not have a supralabyrinthine air cell on the side of surgery. Material and Methods: Our group retrospectively reviewed 50 consecutive pre-operative computed tomography (CT) temporal bone examinations who had confirmed SSCD on intraoperative examination and underwent repair for the presence of a supralabyrinthine air cell. Results: 100% of patients who had confirmed SSCD on intraoperative examination had no supralabyrinthine air cell on pre-operative CT of the temporal bone. Conclusion: This study shows that a supralabyrinthine air cell is not present in SSCD. When a supralabyrinthine air cell is present, the roof of the SSC is intact. CT and magnetic resonance imaging (MRI) are often performed together to evaluate for SSCD and exclude other etiologies. We propose that if a supralabyrinthine air cell is seen on MRI, no CT is necessary, thus avoiding unnecessary radiation exposure and additional imaging costs to the patient.

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Literature study: Superior semicircular canal syndrome (SSCS)

Dina Alia,

Desri Luhonna

2023

Int. J. Sci. Res. Arch.

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Superior Semicircular Canal Syndrome (SSCS) or Superior Canal Dehiscence Syndrome is a rare abnormality in the medical field in the form of balance disturbance or vertigo caused by loud noises or changes in pressure causing rupture of the roof of the superior semicircular canal. SSCS was first described by Lloyd Minor in 1998 after more than 70 years since Tullio and Hennebert discovered the Tullio phenomenon, a condition in which vertigo or nystagmus is triggered by loud noises, and the Hennebert phenomenon, a condition in which vertigo or nystagmus, is triggered by changes in pressure. The exact prevalence of superior semicircular canal syndrome is not known until now. Estimates of prevalence varied from 0.5–2% of cases in temporal bone studies, to 3–9% of cases in studies performed with CT scans. Cases of SSCS are more common in males than females. Clinical symptoms that appear in SSCS are caused by dehiscence so that patients will complain of autophonia, which the sound produced by their body sounds louder, hyperacusis, tinnitus, vertigo which is triggered by loud noises, and nystagmus. A Careful history, an examination of hearing and balance function, also high-resolution CT scan are needed to establish the diagnose of SSCS. Management can be done conservatively. If the complaints are severe, then operative options can be considered.

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Superior Semicircular Canal Dehiscence

Cited by 4 publications

References 43 publications

New bone formation over dehiscent semicircular canal with cartilage cap

New bone formation over dehiscent semicircular canal with cartilage cap

Supralabyrinthine air cell is not present in superior semicircular canal dehiscence

Literature study: Superior semicircular canal syndrome (SSCS)

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