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EAC Osteoma
Philip R. Chapman, MD; H. Ric Harnsberger, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • External auditory canal (EAC) osteoma
              • Definitions

                • Rare, benign, focal, pedunculated, bony overgrowth of osseous EAC with normal overlying soft tissues

              IMAGING

              • General Features

                • CT Findings

                  • Imaging Recommendations

                    DIFFERENTIAL DIAGNOSIS

                      PATHOLOGY

                      • General Features

                        • Gross Pathologic & Surgical Features

                          • Microscopic Features

                            CLINICAL ISSUES

                            • Presentation

                              • Demographics

                                • Natural History & Prognosis

                                  • Treatment

                                    DIAGNOSTIC CHECKLIST

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Chen CK et al: Endoscopic transcanal removal of external auditory canal osteomas. Biomed J. ePub, 2020
                                      2. Iaccarino I et al: A case of external auditory canal osteoma complicated with cholesteatoma, mastoiditis, labyrinthitis and internal auditory canal pachymeningitis. Acta Otorhinolaryngol Ital. 39(5):358-62, 2019
                                      3. Ata N et al: External auditory canal osteoma with cholesteatoma and sinus thrombosis. J Craniofac Surg. 26(7):2234-5, 2015
                                      4. Iizuka T et al: Large osteoma of the external auditory canal. Ear Nose Throat J. 92(7):286, 290, 2013
                                      5. Spielmann PM et al: Surgical management of external auditory canal lesions. J Laryngol Otol. 127(3):246-51, 2013
                                      6. Carbone PN et al: External auditory osteoma. Head Neck Pathol. 6(2):244-6, 2012
                                      7. Viswanatha B: Extracanalicular osteoma of the temporal bone. Ear Nose Throat J. 87(7):381-3, 2008
                                      8. Yuen HW et al: External auditory canal osteoma. Otol Neurotol. 29(6):875-6, 2008
                                      9. Woldenberg Y et al: Peripheral osteoma of the maxillofacial region. Diagnosis and management: a study of 14 cases. Med Oral Patol Oral Cir Bucal. 10 Suppl 2:E139-42, 2005
                                      10. Ramirez-Camacho R et al: Fibro-osseous lesions of the external auditory canal. Laryngoscope. 109(3):488-91, 1999
                                      11. Orita Y et al: Osteoma with cholesteatoma in the external auditory canal. Int J Pediatr Otorhinolaryngol. 43(3):289-93, 1998
                                      12. Kemink JL et al: Osteomas and exostoses of the external auditory canal - medical and surgical management. J Otolaryngol. 11(2):101-6, 1982
                                      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

                                                • Diagnostic Checklist

                                                  TERMINOLOGY

                                                  • Abbreviations

                                                    • External auditory canal (EAC) osteoma
                                                  • Definitions

                                                    • Rare, benign, focal, pedunculated, bony overgrowth of osseous EAC with normal overlying soft tissues

                                                  IMAGING

                                                  • General Features

                                                    • CT Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            • Gross Pathologic & Surgical Features

                                                              • Microscopic Features

                                                                CLINICAL ISSUES

                                                                • Presentation

                                                                  • Demographics

                                                                    • Natural History & Prognosis

                                                                      • Treatment

                                                                        DIAGNOSTIC CHECKLIST

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Chen CK et al: Endoscopic transcanal removal of external auditory canal osteomas. Biomed J. ePub, 2020
                                                                          2. Iaccarino I et al: A case of external auditory canal osteoma complicated with cholesteatoma, mastoiditis, labyrinthitis and internal auditory canal pachymeningitis. Acta Otorhinolaryngol Ital. 39(5):358-62, 2019
                                                                          3. Ata N et al: External auditory canal osteoma with cholesteatoma and sinus thrombosis. J Craniofac Surg. 26(7):2234-5, 2015
                                                                          4. Iizuka T et al: Large osteoma of the external auditory canal. Ear Nose Throat J. 92(7):286, 290, 2013
                                                                          5. Spielmann PM et al: Surgical management of external auditory canal lesions. J Laryngol Otol. 127(3):246-51, 2013
                                                                          6. Carbone PN et al: External auditory osteoma. Head Neck Pathol. 6(2):244-6, 2012
                                                                          7. Viswanatha B: Extracanalicular osteoma of the temporal bone. Ear Nose Throat J. 87(7):381-3, 2008
                                                                          8. Yuen HW et al: External auditory canal osteoma. Otol Neurotol. 29(6):875-6, 2008
                                                                          9. Woldenberg Y et al: Peripheral osteoma of the maxillofacial region. Diagnosis and management: a study of 14 cases. Med Oral Patol Oral Cir Bucal. 10 Suppl 2:E139-42, 2005
                                                                          10. Ramirez-Camacho R et al: Fibro-osseous lesions of the external auditory canal. Laryngoscope. 109(3):488-91, 1999
                                                                          11. Orita Y et al: Osteoma with cholesteatoma in the external auditory canal. Int J Pediatr Otorhinolaryngol. 43(3):289-93, 1998
                                                                          12. Kemink JL et al: Osteomas and exostoses of the external auditory canal - medical and surgical management. J Otolaryngol. 11(2):101-6, 1982