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Head and Neck
Diagnosis
Temporal Bone
External Auditory Canal
Infectious and Inflammatory Lesions
EAC-Acquired Cholesteatoma
EAC-Acquired Cholesteatoma
Nicholas A. Koontz, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Abbreviations

                • External auditory canal cholesteatoma (EACC)

              • Definitions

                • EAC erosive lesion composed of exfoliated keratin within stratified squamous epithelium

              IMAGING

              • General Features

                • CT Findings

                  • MR Findings

                    • Imaging Recommendations

                      DIFFERENTIAL DIAGNOSIS

                        PATHOLOGY

                        • General Features

                          • Staging, Grading, & Classification

                            • Gross Pathologic & Surgical Features

                              • Microscopic Features

                                CLINICAL ISSUES

                                • Presentation

                                  • Demographics

                                    • Natural History & Prognosis

                                      • Treatment

                                        DIAGNOSTIC CHECKLIST

                                        • Consider

                                          • Image Interpretation Pearls

                                            Selected References

                                            1. He G et al: Primary external auditory canal cholesteatoma of 301 ears: a single-center study. Eur Arch Otorhinolaryngol. ePub, 2021
                                            2. He G et al: Clinical analysis of pediatric primary external auditory canal cholesteatoma. Int J Pediatr Otorhinolaryngol. 118:25-30, 2019
                                            3. Mahalle S: Osteoma of external auditory canal associated with external auditory canal cholesteatoma and exuberant granulation tissue in mastoid air cell system: a rare association. Indian J Otolaryngol Head Neck Surg. 71(Suppl 2):1505-7, 2019
                                            4. Morita S et al: Clinical characteristics and treatment outcomes for patients with external auditory canal cholesteatoma. Otol Neurotol. 39(2):189-95, 2018
                                            5. Chawla A et al: Computed tomography features of external auditory canal cholesteatoma: a pictorial review. Curr Probl Diagn Radiol. 44(6):511-6, 2015
                                            6. Park SY et al: Clinical characteristics of keratosis obturans and external auditory canal cholesteatoma. Otolaryngol Head Neck Surg. 152(2):326-30, 2015
                                            7. Kim CW et al: Clinical characteristics of spontaneous cholesteatoma of the external auditory canal in children comparing with cholesteatoma in adults. Eur Arch Otorhinolaryngol. 271(12):3179-85, 2014
                                            8. Sayles M et al: Operative management of external auditory canal cholesteatoma: case series and literature review. J Laryngol Otol. 127(9):859-66, 2013
                                            9. Shinnabe A et al: A comparison of patterns of disease extension in keratosis obturans and external auditory canal cholesteatoma. Otol Neurotol. 34(1):91-4, 2013
                                            10. Baráth K et al: Neuroradiology of cholesteatomas. AJNR Am J Neuroradiol. 32(2):221-9, 2011
                                            11. Lin YS: Surgical results of external canal cholesteatoma. Acta Otolaryngol. 129(6):615-23, 2009
                                            12. Bonding P et al: Primary cholesteatoma of the external auditory canal: is the epithelial migration defective? Otol Neurotol. 29(3):334-8, 2008
                                            13. Dubach P et al: External auditory canal cholesteatoma: reassessment of and amendments to its categorization, pathogenesis, and treatment in 34 patients. Otol Neurotol. 29(7):941-8, 2008
                                            14. Yoon YH et al: Clinical characteristics of external auditory canal cholesteatoma in children. Otolaryngol Head Neck Surg. 139(5):661-4, 2008
                                            15. Naim R et al: Classification of the external auditory canal cholesteatoma. Laryngoscope. 115(3):455-60, 2005
                                            16. Heilbrun ME et al: External auditory canal cholesteatoma: clinical and imaging spectrum. AJNR Am J Neuroradiol. 24(4):751-6, 2003
                                            17. Venkatraman G et al: External auditory canal wall cholesteatoma: a complication of ear surgery. Acta Otolaryngol. 117(2):293-7, 1997
                                            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 cholesteatoma (EACC)

                                                        • Definitions

                                                          • EAC erosive lesion composed of exfoliated keratin within stratified squamous epithelium

                                                        IMAGING

                                                        • General Features

                                                          • CT Findings

                                                            • MR Findings

                                                              • Imaging Recommendations

                                                                DIFFERENTIAL DIAGNOSIS

                                                                  PATHOLOGY

                                                                  • General Features

                                                                    • Staging, Grading, & Classification

                                                                      • Gross Pathologic & Surgical Features

                                                                        • Microscopic Features

                                                                          CLINICAL ISSUES

                                                                          • Presentation

                                                                            • Demographics

                                                                              • Natural History & Prognosis

                                                                                • Treatment

                                                                                  DIAGNOSTIC CHECKLIST

                                                                                  • Consider

                                                                                    • Image Interpretation Pearls

                                                                                      Selected References

                                                                                      1. He G et al: Primary external auditory canal cholesteatoma of 301 ears: a single-center study. Eur Arch Otorhinolaryngol. ePub, 2021
                                                                                      2. He G et al: Clinical analysis of pediatric primary external auditory canal cholesteatoma. Int J Pediatr Otorhinolaryngol. 118:25-30, 2019
                                                                                      3. Mahalle S: Osteoma of external auditory canal associated with external auditory canal cholesteatoma and exuberant granulation tissue in mastoid air cell system: a rare association. Indian J Otolaryngol Head Neck Surg. 71(Suppl 2):1505-7, 2019
                                                                                      4. Morita S et al: Clinical characteristics and treatment outcomes for patients with external auditory canal cholesteatoma. Otol Neurotol. 39(2):189-95, 2018
                                                                                      5. Chawla A et al: Computed tomography features of external auditory canal cholesteatoma: a pictorial review. Curr Probl Diagn Radiol. 44(6):511-6, 2015
                                                                                      6. Park SY et al: Clinical characteristics of keratosis obturans and external auditory canal cholesteatoma. Otolaryngol Head Neck Surg. 152(2):326-30, 2015
                                                                                      7. Kim CW et al: Clinical characteristics of spontaneous cholesteatoma of the external auditory canal in children comparing with cholesteatoma in adults. Eur Arch Otorhinolaryngol. 271(12):3179-85, 2014
                                                                                      8. Sayles M et al: Operative management of external auditory canal cholesteatoma: case series and literature review. J Laryngol Otol. 127(9):859-66, 2013
                                                                                      9. Shinnabe A et al: A comparison of patterns of disease extension in keratosis obturans and external auditory canal cholesteatoma. Otol Neurotol. 34(1):91-4, 2013
                                                                                      10. Baráth K et al: Neuroradiology of cholesteatomas. AJNR Am J Neuroradiol. 32(2):221-9, 2011
                                                                                      11. Lin YS: Surgical results of external canal cholesteatoma. Acta Otolaryngol. 129(6):615-23, 2009
                                                                                      12. Bonding P et al: Primary cholesteatoma of the external auditory canal: is the epithelial migration defective? Otol Neurotol. 29(3):334-8, 2008
                                                                                      13. Dubach P et al: External auditory canal cholesteatoma: reassessment of and amendments to its categorization, pathogenesis, and treatment in 34 patients. Otol Neurotol. 29(7):941-8, 2008
                                                                                      14. Yoon YH et al: Clinical characteristics of external auditory canal cholesteatoma in children. Otolaryngol Head Neck Surg. 139(5):661-4, 2008
                                                                                      15. Naim R et al: Classification of the external auditory canal cholesteatoma. Laryngoscope. 115(3):455-60, 2005
                                                                                      16. Heilbrun ME et al: External auditory canal cholesteatoma: clinical and imaging spectrum. AJNR Am J Neuroradiol. 24(4):751-6, 2003
                                                                                      17. Venkatraman G et al: External auditory canal wall cholesteatoma: a complication of ear surgery. Acta Otolaryngol. 117(2):293-7, 1997