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Semicircular Canal Dehiscence
Bronwyn E. Hamilton, MD; Troy A. Hutchins, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Pathology

        • Clinical Issues

          • Diagnostic Checklist

            TERMINOLOGY

            • Abbreviations

              • Semicircular canal dehiscence (SCCD)
            • Definitions

              • Extreme thinning or absence of bone roof over superior or posterior semicircular canal (SCC)

            IMAGING

            • General Features

              • CT Findings

                • MR Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Chari DA et al: Radiologically-proven new development of superior semicircular canal dehiscence associated with development of superior semicircular canal dehiscence syndrome. Otol Neurotol. 42(2):285-9, 2021
                                      2. Ionescu E et al: Superior semicircular canal dehiscence by superior petrosal sinus: proposal for classification. J Int Adv Otol. 17(1):35-41, 2021
                                      3. Arsenault JJ et al: Thinning or dehiscence of bone in structures of the middle cranial fossa floor in superior semicircular canal dehiscence. J Clin Neurosci. 74:104-8, 2020
                                      4. Cozart AC et al: A basis for standardizing superior semicircular canal dehiscence management. Ear Nose Throat J. 145561320927941, 2020
                                      5. Duman IS et al: Contribution of reformatted multislice temporal computed tomography images in the planes of Stenvers and Pöschl to the diagnosis of superior semicircular canal dehiscence. J Comput Assist Tomogr. 44(1):53-8, 2020
                                      6. Lee JA et al: Posterior semicircular canal dehiscence: case series and systematic review. Otol Neurotol. 41(4):511-21, 2020
                                      7. McClellan J et al: Stapes surgery outcomes in patients with concurrent otosclerosis and superior semicircular canal dehiscence. Otol Neurotol. 41(7):912-5, 2020
                                      8. Ray A et al: MRI contribution for the detection of endolymphatic hydrops in patients with superior canal dehiscence syndrome. Eur Arch Otorhinolaryngol. 278(7):2229-38, 2020
                                      9. Tikka T et al: Temporal bone anatomy in superior semicircular canal dehiscence: a case control study on bone pneumatization and the level of middle cranial fossa. Otol Neurotol. 41(3):e334-41, 2020
                                      10. Berning AW et al: Prevalence of superior semicircular canal dehiscence on high-resolution CT imaging in patients without vestibular or auditory abnormalities. AJNR Am J Neuroradiol. 40(4):709-12, 2019
                                      11. Preet K et al: Bilateral superior semicircular canal dehiscence associated with Ehlers-Danlos syndrome: a report of 2 cases. World Neurosurg. 122:161-4, 2019
                                      12. Whyte J et al: Association between superior semicircular canal dehiscence and other dehiscences in temporal bone. Folia Morphol (Warsz). 79(4):823-8, 2019
                                      13. Heidenreich KD et al: Superior canal dehiscence syndrome affecting 3 families. JAMA Otolaryngol Head Neck Surg. 143(7):656-62, 2017
                                      14. Ho ML et al: Spectrum of third window abnormalities: semicircular canal dehiscence and beyond. AJNR Am J Neuroradiol. 38(1):2-9, 2017
                                      15. Sparacia G et al: Diagnostic performance of reformatted isotropic thin-section helical CT images in the detection of superior semicircular canal dehiscence. Neuroradiol J. 30(3):216-21, 2017
                                      16. Klopp-Dutote N et al: A radiologic and anatomic study of the superior semicircular canal. Eur Ann Otorhinolaryngol Head Neck Dis. 133(2):91-4, 2016
                                      17. Noonan KY et al: CDH23 related hearing loss: a new genetic risk factor for semicircular canal dehiscence? Otol Neurotol. 37(10):1583-8, 2016
                                      18. Spear SA et al: Is MRI equal to CT in the evaluation of thin and dehiscent superior semicircular canals? Otol Neurotol. 37(2):167-70, 2016
                                      19. Chilvers G et al: Recent advances in superior semicircular canal dehiscence syndrome. J Laryngol Otol. 129(3):217-25, 2015
                                      20. Liu Z et al: Superior semicircular canal dehiscence in relation to the superior petrosal sinus: a potential cause of pulsatile tinnitus. Clin Radiol. 70(9):943-7, 2015
                                      21. Browaeys P et al: Can MRI replace CT in evaluating semicircular canal dehiscence? AJNR Am J Neuroradiol. 34(7):1421-7, 2013
                                      22. Ceylan N et al: CT imaging of superior semicircular canal dehiscence: added value of reformatted images. Acta Otolaryngol. 130(9):996-1001, 2010
                                      23. Cloutier JF et al: Superior semicircular canal dehiscence: positive predictive value of high-resolution CT scanning. Eur Arch Otorhinolaryngol. 265(12):1455-60, 2008
                                      24. Krombach GA et al: Semicircular canal dehiscence: comparison of T2-weighted turbo spin-echo MRI and CT. Neuroradiology. 46(4):326-31, 2004
                                      25. Williamson RA et al: Coronal computed tomography prevalence of superior semicircular canal dehiscence. Otolaryngol Head Neck Surg. 129(5):481-9, 2003
                                      26. Minor LB: Superior canal dehiscence syndrome. Am J Otol. 21(1):9-19, 2000
                                      27. Mong A et al: Sound- and pressure-induced vertigo associated with dehiscence of the roof of the superior semicircular canal. AJNR Am J Neuroradiol. 20(10):1973-5, 1999
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging

                                          • Pathology

                                            • Clinical Issues

                                              • Diagnostic Checklist

                                                TERMINOLOGY

                                                • Abbreviations

                                                  • Semicircular canal dehiscence (SCCD)
                                                • Definitions

                                                  • Extreme thinning or absence of bone roof over superior or posterior semicircular canal (SCC)

                                                IMAGING

                                                • General Features

                                                  • CT Findings

                                                    • MR Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            • Gross Pathologic & Surgical Features

                                                              CLINICAL ISSUES

                                                              • Presentation

                                                                • Demographics

                                                                  • Natural History & Prognosis

                                                                    • Treatment

                                                                      DIAGNOSTIC CHECKLIST

                                                                      • Consider

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Chari DA et al: Radiologically-proven new development of superior semicircular canal dehiscence associated with development of superior semicircular canal dehiscence syndrome. Otol Neurotol. 42(2):285-9, 2021
                                                                          2. Ionescu E et al: Superior semicircular canal dehiscence by superior petrosal sinus: proposal for classification. J Int Adv Otol. 17(1):35-41, 2021
                                                                          3. Arsenault JJ et al: Thinning or dehiscence of bone in structures of the middle cranial fossa floor in superior semicircular canal dehiscence. J Clin Neurosci. 74:104-8, 2020
                                                                          4. Cozart AC et al: A basis for standardizing superior semicircular canal dehiscence management. Ear Nose Throat J. 145561320927941, 2020
                                                                          5. Duman IS et al: Contribution of reformatted multislice temporal computed tomography images in the planes of Stenvers and Pöschl to the diagnosis of superior semicircular canal dehiscence. J Comput Assist Tomogr. 44(1):53-8, 2020
                                                                          6. Lee JA et al: Posterior semicircular canal dehiscence: case series and systematic review. Otol Neurotol. 41(4):511-21, 2020
                                                                          7. McClellan J et al: Stapes surgery outcomes in patients with concurrent otosclerosis and superior semicircular canal dehiscence. Otol Neurotol. 41(7):912-5, 2020
                                                                          8. Ray A et al: MRI contribution for the detection of endolymphatic hydrops in patients with superior canal dehiscence syndrome. Eur Arch Otorhinolaryngol. 278(7):2229-38, 2020
                                                                          9. Tikka T et al: Temporal bone anatomy in superior semicircular canal dehiscence: a case control study on bone pneumatization and the level of middle cranial fossa. Otol Neurotol. 41(3):e334-41, 2020
                                                                          10. Berning AW et al: Prevalence of superior semicircular canal dehiscence on high-resolution CT imaging in patients without vestibular or auditory abnormalities. AJNR Am J Neuroradiol. 40(4):709-12, 2019
                                                                          11. Preet K et al: Bilateral superior semicircular canal dehiscence associated with Ehlers-Danlos syndrome: a report of 2 cases. World Neurosurg. 122:161-4, 2019
                                                                          12. Whyte J et al: Association between superior semicircular canal dehiscence and other dehiscences in temporal bone. Folia Morphol (Warsz). 79(4):823-8, 2019
                                                                          13. Heidenreich KD et al: Superior canal dehiscence syndrome affecting 3 families. JAMA Otolaryngol Head Neck Surg. 143(7):656-62, 2017
                                                                          14. Ho ML et al: Spectrum of third window abnormalities: semicircular canal dehiscence and beyond. AJNR Am J Neuroradiol. 38(1):2-9, 2017
                                                                          15. Sparacia G et al: Diagnostic performance of reformatted isotropic thin-section helical CT images in the detection of superior semicircular canal dehiscence. Neuroradiol J. 30(3):216-21, 2017
                                                                          16. Klopp-Dutote N et al: A radiologic and anatomic study of the superior semicircular canal. Eur Ann Otorhinolaryngol Head Neck Dis. 133(2):91-4, 2016
                                                                          17. Noonan KY et al: CDH23 related hearing loss: a new genetic risk factor for semicircular canal dehiscence? Otol Neurotol. 37(10):1583-8, 2016
                                                                          18. Spear SA et al: Is MRI equal to CT in the evaluation of thin and dehiscent superior semicircular canals? Otol Neurotol. 37(2):167-70, 2016
                                                                          19. Chilvers G et al: Recent advances in superior semicircular canal dehiscence syndrome. J Laryngol Otol. 129(3):217-25, 2015
                                                                          20. Liu Z et al: Superior semicircular canal dehiscence in relation to the superior petrosal sinus: a potential cause of pulsatile tinnitus. Clin Radiol. 70(9):943-7, 2015
                                                                          21. Browaeys P et al: Can MRI replace CT in evaluating semicircular canal dehiscence? AJNR Am J Neuroradiol. 34(7):1421-7, 2013
                                                                          22. Ceylan N et al: CT imaging of superior semicircular canal dehiscence: added value of reformatted images. Acta Otolaryngol. 130(9):996-1001, 2010
                                                                          23. Cloutier JF et al: Superior semicircular canal dehiscence: positive predictive value of high-resolution CT scanning. Eur Arch Otorhinolaryngol. 265(12):1455-60, 2008
                                                                          24. Krombach GA et al: Semicircular canal dehiscence: comparison of T2-weighted turbo spin-echo MRI and CT. Neuroradiology. 46(4):326-31, 2004
                                                                          25. Williamson RA et al: Coronal computed tomography prevalence of superior semicircular canal dehiscence. Otolaryngol Head Neck Surg. 129(5):481-9, 2003
                                                                          26. Minor LB: Superior canal dehiscence syndrome. Am J Otol. 21(1):9-19, 2000
                                                                          27. Mong A et al: Sound- and pressure-induced vertigo associated with dehiscence of the roof of the superior semicircular canal. AJNR Am J Neuroradiol. 20(10):1973-5, 1999