Anatomo-radiological study of the Superior Semicircular Canal Dehiscence

Crovetto, Miguel Ángel; Whyte, J; Rodríguez, Olivia; Lecumberri, Iñigo; Martínez, Claudio; Eléxpuru, J.

doi:10.1016/j.ejrad.2009.05.038

Cited by 108 publications

(34 citation statements)

References 19 publications

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“…Our findings of a radiologic incidence of SSCD of 10.8% in the study population and an incidence of bilateral dehiscence of 33.3% are in agreement with previous literature which documents the radiologic incidence of SSCD between 3-12% (3,4,5,6,7,8,9) and the incidence of bilateral dehiscence between 25-60% (7,18). Our observations also provide new information regarding SSCD.…”

Section: Discussionsupporting

confidence: 93%

“…In cadaver temporal bone specimens, the prevalence of SSCD has been reported to be 0.5%, with an additional 1.4% of specimens displaying an abnormally thin tegmen overlying the superior semicircular canal (2). The prevalence of SSCD on high resolution computed tomography (HRCT) imaging is generally accepted to be higher than that in cadaver studies and ranges from 3-12% (3,4,5,6,7,8). These differences are attributed to limitations of HRCT imaging, including an inability to identify very thin layers of bone overlying the semicircular canal and to partial volume averaging effects (5).…”

Section: Introductionmentioning

confidence: 99%

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Radiographic Features of Superior Semicircular Canal Dehiscence in the Setting of Chronic Ear Disease

Gartrell

Gentry

Kennedy³

et al. 2014

Otology &Amp; Neurotology

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Objective To determine if radiologic chronic otitis media (COM), both with and without cholesteatoma, is associated with superior semicircular canal dehiscence (SSCD). Study Design Retrospective review of consecutive high-resolution computed tomography (HRCT) scans of the temporal bone. Setting Tertiary care medical center Patients Two-hundred consecutive patients undergoing HRCT of the temporal bone beginning January 1st, 2012. Intervention Imaging was evaluated by three reviewers (two neuroradiologists and one neurotologist). All scans were assessed for the presence of SSCD, cholesteatoma, chronic otomastoiditis, tegmen dehiscence, and for abnormalities of the cochlea, vestibule, facial nerve, and temporal bone vasculature. Main Outcome Measure Ears with COM associated with chronic otomastoiditis or cholesteatoma were compared to those without COM with respect to the presence of SSCD or other temporal bone abnormalities. Statistical analysis was performed to assess for differences between the groups studied. Results 194 patients (388 ears) were included. Cholesteatoma was identified in 48 ears (12.4%) and chronic otomastoiditis in 62 ears (16%). Ten ears with cholesteatoma had ipsilateral SSCD and 8 ears with chronic otomastoiditis had ipsilateral SSCD. In 340 ears without either cholesteatoma or chronic otomastoiditis, SSCD was found in 18 (5.3%). SSCD was found to occur significantly more often in patients with ipsilateral radiologic cholesteatoma. No cases of SSCD were associated with cochlear, facial nerve, or vascular abnormalities. Conclusion Our findings suggest that COM with cholesteatoma is associated with the presence of SSCD, although the nature of this association is unclear.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Radiographic Features of Superior Semicircular Canal Dehiscence in the Setting of Chronic Ear Disease

Gartrell

Gentry

Kennedy³

et al. 2014

Otology &Amp; Neurotology

View full text Add to dashboard Cite

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“…This technique tends to overestimate the presence and dimension of semicircular canal dehiscence (30) (31). The prevalence of SCDS in CT scans in vivo resulted in significantly higher values that the real prevalence of bony dehiscence in dry temporal bone specimens, the former at 3.6%, the latter at 0.6% (32).…”

Section: The Superior Canal Dehiscence Syndrome (Scds)mentioning

confidence: 81%

Diagnostic Accuracy of Ocular Vestibular Evoked Myogenic Potentials for Superior Canal Dehiscence Syndrome in a Large Cohort of Dizzy Patients

et al. 2019

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oVEMP was able to identify all subjects affected by SCDS, according to our diagnostic criteria, in a large cohort of unselected dizzy patients. The AC oVEMP amplitude parameter showed optimal sensitivity and high specificity for SCDS and may represent an ideal screening test for SCDS among dizzy patients. This is noteworthy when considering that not all SCDS patients express the clinical key features of vestibular hypersensitivity to sound or pressure change, even though most complain of dizziness.

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“…Autopsy series of cadaver temporal bone revealed an incidence of 0.3% in the general population without neuro-otologic deficits [12]. But among those with inner ear symptoms, the incidence may be as high as 19% in a retrospective series [12].…”

Section: Discussionmentioning

confidence: 99%

Superior semicircular canal dehiscence in East Asian women with osteoporosis

Teich

Moonis

et al. 2012

BMC Ear Nose Throat Disord

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BackgroundSuperior semicircular canal dehiscence (SSCD) may cause Tullio phenomenon (sound-induced vertigo) or Hennebert sign (valsalva-induced vertigo) due to the absence of bone overlying the SSC. We document a case series of elderly East Asian women with atypical SSCD symptoms, radiologically confirmed dehiscence and concurrent osteoporosis.MethodsA retrospective record review was performed on patients with dizziness, vertigo, and/or imbalance from a neurology clinic in a community health center serving the East Asian population in Boston. SSCD was confirmed by multi-detector, high-resolution CT of the temporal bone (with Pöschl and Stenvers reformations) and osteoporosis was documented by bone mineral density (BMD) scans.ResultsOf the 496 patients seen in the neurology clinic of a community health center from 2008 to 2010, 76 (17.3%) had symptoms of dizziness, vertigo, and/or imbalance. Five (6.6%) had confirmed SSCD by multi-detector, high-resolution CT of the temporal bone with longitudinal areas of dehiscence along the long axis of SSC, ranging from 0.4 to 3.0 mm, as seen on the Pöschl view. Two of the 5 patients experienced motion-induced vertigo, two fell due to disequilibrium, and one had chronic dizziness. None had a history of head trauma, otologic surgery, or active intracerebral disease. On neurological examination, two patients had inducible vertigo on Dix-Hallpike maneuver and none experienced cerebellar deficit, Tullio phenomenon, or Hennebert sign. All had documented osteoporosis or osteopenia by BMD scans. Three of them had definite osteoporosis, with T-scores < −2.5 in the axial spine, while another had osteopenia with a T-score of −2.3 in the left femur.ConclusionsWe describe an unusual presentation of SSCD without Tullio phenomenon or Hennebert sign in a population of elderly, East Asian women. There may be an association of SSCD and osteoporosis in this population. Further research is needed to determine the incidence and prevalence of this disorder, as well as the relationship of age, race, osteoporosis risk, and the development of SSCD.

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Anatomo-radiological study of the Superior Semicircular Canal Dehiscence

Cited by 108 publications

References 19 publications

Radiographic Features of Superior Semicircular Canal Dehiscence in the Setting of Chronic Ear Disease

Radiographic Features of Superior Semicircular Canal Dehiscence in the Setting of Chronic Ear Disease

Diagnostic Accuracy of Ocular Vestibular Evoked Myogenic Potentials for Superior Canal Dehiscence Syndrome in a Large Cohort of Dizzy Patients

Superior semicircular canal dehiscence in East Asian women with osteoporosis

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