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Head and Neck
Diagnosis
Temporal Bone
External Auditory Canal
Congenital Lesions
Foramen Tympanicum
Foramen Tympanicum
Bernadette L. Koch, MD; H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            TERMINOLOGY

            • Synonyms

              • Foramen of Huschke
              • Tympanic bone dehiscence

            • Definitions

              • Foramen tympanicum
                • Developmental ossification defect in anteroinferior aspect of bony external auditory canal (EAC)

            IMAGING

            • General Features

              • CT Findings

                • MR Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        CLINICAL ISSUES

                        • Presentation

                          • Demographics

                            • Natural History & Prognosis

                              Selected References

                              1. Herreira-Ferreira M et al: Cone-beam computed tomographic study of the persistent foramen tympanicum according to age, sex, and skeletal patterns. Br J Oral Maxillofac Surg. 58(9):e57-61, 2020
                              2. Akbulut N et al: Evaluation of foramen tympanicum using cone-beam computed tomography in orthodontic malocclusions. J Craniofac Surg. 25(2):e105-9, 2014
                              3. Nakasato T et al: Spontaneous temporomandibular joint herniation into the external auditory canal through a persistent foramen tympanicum (Huschke): radiographic features. J Comput Assist Tomogr. 37(1):111-3, 2013
                              4. Tozoglu U et al: Foramen tympanicum or foramen of Huschke: anatomical cone beam CT study. Dentomaxillofac Radiol. 41(4):294-7, 2012
                              5. Hashimoto T et al: The foramen of Huschke: age and gender specific features after childhood. Int J Oral Maxillofac Surg. 40(7):743-6, 2011
                              6. Prowse SJ et al: Temporomandibular joint herniation and the foramen of Huschke: an unusual external auditory canal mass. J Laryngol Otol. 125(12):1279-81, 2011
                              7. Park YH et al: Temporomandibular joint herniation into the external auditory canal. Laryngoscope. 120(11):2284-8, 2010
                              8. De Zoysa N et al: Gustatory otorrhoea: a rare case of congenital external ear salivary fistula. J Laryngol Otol. 123(12):1371-4, 2009
                              9. Fusconi M et al: Foramen of Huschke: case report and experimental procedure for diagnosis of spontaneous salivary fistula. J Oral Maxillofac Surg. 67(8):1747-51, 2009
                              10. Lacout A et al: Foramen tympanicum, or foramen of Huschke: pathologic cases and anatomic CT study. AJNR Am J Neuroradiol. 26(6):1317-23, 2005
                              11. Rushton VE et al: Salivary otorrhoea: a case report and a review of the literature. Dentomaxillofac Radiol. 34(6):376-9, 2005
                              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

                                        • Synonyms

                                          • Foramen of Huschke
                                          • Tympanic bone dehiscence

                                        • Definitions

                                          • Foramen tympanicum
                                            • Developmental ossification defect in anteroinferior aspect of bony external auditory canal (EAC)

                                        IMAGING

                                        • General Features

                                          • CT Findings

                                            • MR Findings

                                              • Imaging Recommendations

                                                DIFFERENTIAL DIAGNOSIS

                                                  PATHOLOGY

                                                  • General Features

                                                    CLINICAL ISSUES

                                                    • Presentation

                                                      • Demographics

                                                        • Natural History & Prognosis

                                                          Selected References

                                                          1. Herreira-Ferreira M et al: Cone-beam computed tomographic study of the persistent foramen tympanicum according to age, sex, and skeletal patterns. Br J Oral Maxillofac Surg. 58(9):e57-61, 2020
                                                          2. Akbulut N et al: Evaluation of foramen tympanicum using cone-beam computed tomography in orthodontic malocclusions. J Craniofac Surg. 25(2):e105-9, 2014
                                                          3. Nakasato T et al: Spontaneous temporomandibular joint herniation into the external auditory canal through a persistent foramen tympanicum (Huschke): radiographic features. J Comput Assist Tomogr. 37(1):111-3, 2013
                                                          4. Tozoglu U et al: Foramen tympanicum or foramen of Huschke: anatomical cone beam CT study. Dentomaxillofac Radiol. 41(4):294-7, 2012
                                                          5. Hashimoto T et al: The foramen of Huschke: age and gender specific features after childhood. Int J Oral Maxillofac Surg. 40(7):743-6, 2011
                                                          6. Prowse SJ et al: Temporomandibular joint herniation and the foramen of Huschke: an unusual external auditory canal mass. J Laryngol Otol. 125(12):1279-81, 2011
                                                          7. Park YH et al: Temporomandibular joint herniation into the external auditory canal. Laryngoscope. 120(11):2284-8, 2010
                                                          8. De Zoysa N et al: Gustatory otorrhoea: a rare case of congenital external ear salivary fistula. J Laryngol Otol. 123(12):1371-4, 2009
                                                          9. Fusconi M et al: Foramen of Huschke: case report and experimental procedure for diagnosis of spontaneous salivary fistula. J Oral Maxillofac Surg. 67(8):1747-51, 2009
                                                          10. Lacout A et al: Foramen tympanicum, or foramen of Huschke: pathologic cases and anatomic CT study. AJNR Am J Neuroradiol. 26(6):1317-23, 2005
                                                          11. Rushton VE et al: Salivary otorrhoea: a case report and a review of the literature. Dentomaxillofac Radiol. 34(6):376-9, 2005