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Oval Window Atresia
H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            TERMINOLOGY

            • Abbreviations

              • Oval window atresia (OWA)
            • Synonyms

              • Congenital absence of oval window (OW)
            • Definitions

              • Absent cleavage plane (OW = stapes footplate + annular ligament) between lateral semicircular canal above & cochlear promontory below associated with anomalous stapes & malpositioned CN7

            IMAGING

            • General Features

              • CT 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. Thomeer H et al: Congenital oval or round window anomaly with or without abnormal facial nerve course: surgical results for 15 ears. Otol Neurotol. 33(5):779-84, 2012
                                    2. de Alarcon A et al: Congenital absence of the oval window: diagnosis, surgery, and audiometric outcomes. Otol Neurotol. 29(1):23-8, 2008
                                    3. Martin C et al: Abnormal facial nerve course associated with stapes fixation or oval window absence: report of two cases. Eur Arch Otorhinolaryngol. 263(1):79-85, 2006
                                    4. Booth TN et al: Imaging and clinical evaluation of isolated atresia of the oval window. AJNR Am J Neuroradiol. 21(1):171-4, 2000
                                    5. Zeifer B et al: Congenital absence of the oval window: radiologic diagnosis and associated anomalies. AJNR Am J Neuroradiol. 21(2):322-7, 2000
                                    6. Lambert PR: Congenital absence of the oval window. Laryngoscope. 100(1):37-40, 1990
                                    Related Anatomy
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                                    Related Differential Diagnoses
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                                    References
                                    Tables

                                    Tables

                                    KEY FACTS

                                    • Terminology

                                      • Imaging

                                        • Top Differential Diagnoses

                                          • Pathology

                                            • Clinical Issues

                                              TERMINOLOGY

                                              • Abbreviations

                                                • Oval window atresia (OWA)
                                              • Synonyms

                                                • Congenital absence of oval window (OW)
                                              • Definitions

                                                • Absent cleavage plane (OW = stapes footplate + annular ligament) between lateral semicircular canal above & cochlear promontory below associated with anomalous stapes & malpositioned CN7

                                              IMAGING

                                              • General Features

                                                • CT 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. Thomeer H et al: Congenital oval or round window anomaly with or without abnormal facial nerve course: surgical results for 15 ears. Otol Neurotol. 33(5):779-84, 2012
                                                                      2. de Alarcon A et al: Congenital absence of the oval window: diagnosis, surgery, and audiometric outcomes. Otol Neurotol. 29(1):23-8, 2008
                                                                      3. Martin C et al: Abnormal facial nerve course associated with stapes fixation or oval window absence: report of two cases. Eur Arch Otorhinolaryngol. 263(1):79-85, 2006
                                                                      4. Booth TN et al: Imaging and clinical evaluation of isolated atresia of the oval window. AJNR Am J Neuroradiol. 21(1):171-4, 2000
                                                                      5. Zeifer B et al: Congenital absence of the oval window: radiologic diagnosis and associated anomalies. AJNR Am J Neuroradiol. 21(2):322-7, 2000
                                                                      6. Lambert PR: Congenital absence of the oval window. Laryngoscope. 100(1):37-40, 1990