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Temporal Bone Facial Nerve Schwannoma
H. Ric Harnsberger, MD
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5

KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Clinical Issues

          TERMINOLOGY

          • Abbreviations

            • Facial nerve schwannoma (FNS)
          • Synonyms

            • Facial neuroma, facial neurilemmoma
          • Definitions

            • FNS: Rare benign tumor of Schwann cells that invests intratemporal facial nerve (CNVII)

          IMAGING

          • General Features

            • CT Findings

              • MR Findings

                • Imaging Recommendations

                  DIFFERENTIAL DIAGNOSIS

                    PATHOLOGY

                    • General Features

                      • Gross Pathologic & Surgical Features

                        • Microscopic Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Consider

                                    • Image Interpretation Pearls

                                      Selected References

                                      1. Bäck L et al: Management of facial nerve schwannoma: a single institution experience. Acta Otolaryngol. 130(10):1193-8, 2010
                                      2. Chao WC et al: Facial nerve schwannoma. Otolaryngol Head Neck Surg. 141(1):146-7, 2009
                                      3. Madhok R et al: Gamma knife radiosurgery for facial schwannomas. Neurosurgery. 64(6):1102-5; discussion 1105, 2009
                                      4. Nishioka K et al: Stereotactic radiotherapy for intracranial nonacoustic schwannomas including facial nerve schwannoma. Int J Radiat Oncol Biol Phys. 75(5):1415-9, 2009
                                      5. Thompson AL et al: Magnetic resonance imaging of facial nerve schwannoma. Laryngoscope. 119(12):2428-36, 2009
                                      6. McMonagle B et al: Facial schwannoma: results of a large case series and review. J Laryngol Otol. 122(11):1139-50, 2008
                                      7. Lee JD et al: Management of facial nerve schwannoma in patients with favorable facial function. Laryngoscope. 117(6):1063-8, 2007
                                      8. Stasolla A et al: Dural tail: another face of facial nerve schwannoma? AJNR Am J Neuroradiol. 27(9):1804; author reply 1805, 2006
                                      9. Wiggins RH 3rd et al: The many faces of facial nerve schwannoma. AJNR Am J Neuroradiol. 27(3):694-9, 2006
                                      10. Kim CS et al: Management of intratemporal facial nerve schwannoma. Otol Neurotol. 24(2):312-6, 2003
                                      11. Kertesz TR et al: Intratemporal facial nerve neuroma: anatomical location and radiological features. Laryngoscope. 111(7):1250-6, 2001
                                      12. Liu R et al: Facial nerve schwannoma: surgical excision versus conservative management. Ann Otol Rhinol Laryngol. 110(11):1025-9, 2001
                                      13. Salzman KL et al: Dumbbell schwannomas of the internal auditory canal. AJNR Am J Neuroradiol. 22(7):1368-76, 2001
                                      14. Chung SY et al: Facial nerve schwannomas: CT and MR findings. Yonsei Med J. 39(2):148-53, 1998
                                      15. McMenomey SO et al: Facial nerve neuromas presenting as acoustic tumors. Am J Otol. 15(3):307-12, 1994
                                      16. Parnes LS et al: Magnetic resonance imaging of facial nerve neuromas. Laryngoscope. 101(1 Pt 1):31-5, 1991
                                      17. Inoue Y et al: Facial nerve neuromas: CT findings. J Comput Assist Tomogr. 11(6):942-7, 1987
                                      Related Anatomy
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                                      Related Differential Diagnoses
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                                      References
                                      Tables

                                      Tables

                                      KEY FACTS

                                      • Terminology

                                        • Imaging

                                          • Top Differential Diagnoses

                                            • Clinical Issues

                                              TERMINOLOGY

                                              • Abbreviations

                                                • Facial nerve schwannoma (FNS)
                                              • Synonyms

                                                • Facial neuroma, facial neurilemmoma
                                              • Definitions

                                                • FNS: Rare benign tumor of Schwann cells that invests intratemporal facial nerve (CNVII)

                                              IMAGING

                                              • General Features

                                                • CT Findings

                                                  • MR Findings

                                                    • Imaging Recommendations

                                                      DIFFERENTIAL DIAGNOSIS

                                                        PATHOLOGY

                                                        • General Features

                                                          • Gross Pathologic & Surgical Features

                                                            • Microscopic Features

                                                              CLINICAL ISSUES

                                                              • Presentation

                                                                • Demographics

                                                                  • Natural History & Prognosis

                                                                    • Treatment

                                                                      DIAGNOSTIC CHECKLIST

                                                                      • Consider

                                                                        • Image Interpretation Pearls

                                                                          Selected References

                                                                          1. Bäck L et al: Management of facial nerve schwannoma: a single institution experience. Acta Otolaryngol. 130(10):1193-8, 2010
                                                                          2. Chao WC et al: Facial nerve schwannoma. Otolaryngol Head Neck Surg. 141(1):146-7, 2009
                                                                          3. Madhok R et al: Gamma knife radiosurgery for facial schwannomas. Neurosurgery. 64(6):1102-5; discussion 1105, 2009
                                                                          4. Nishioka K et al: Stereotactic radiotherapy for intracranial nonacoustic schwannomas including facial nerve schwannoma. Int J Radiat Oncol Biol Phys. 75(5):1415-9, 2009
                                                                          5. Thompson AL et al: Magnetic resonance imaging of facial nerve schwannoma. Laryngoscope. 119(12):2428-36, 2009
                                                                          6. McMonagle B et al: Facial schwannoma: results of a large case series and review. J Laryngol Otol. 122(11):1139-50, 2008
                                                                          7. Lee JD et al: Management of facial nerve schwannoma in patients with favorable facial function. Laryngoscope. 117(6):1063-8, 2007
                                                                          8. Stasolla A et al: Dural tail: another face of facial nerve schwannoma? AJNR Am J Neuroradiol. 27(9):1804; author reply 1805, 2006
                                                                          9. Wiggins RH 3rd et al: The many faces of facial nerve schwannoma. AJNR Am J Neuroradiol. 27(3):694-9, 2006
                                                                          10. Kim CS et al: Management of intratemporal facial nerve schwannoma. Otol Neurotol. 24(2):312-6, 2003
                                                                          11. Kertesz TR et al: Intratemporal facial nerve neuroma: anatomical location and radiological features. Laryngoscope. 111(7):1250-6, 2001
                                                                          12. Liu R et al: Facial nerve schwannoma: surgical excision versus conservative management. Ann Otol Rhinol Laryngol. 110(11):1025-9, 2001
                                                                          13. Salzman KL et al: Dumbbell schwannomas of the internal auditory canal. AJNR Am J Neuroradiol. 22(7):1368-76, 2001
                                                                          14. Chung SY et al: Facial nerve schwannomas: CT and MR findings. Yonsei Med J. 39(2):148-53, 1998
                                                                          15. McMenomey SO et al: Facial nerve neuromas presenting as acoustic tumors. Am J Otol. 15(3):307-12, 1994
                                                                          16. Parnes LS et al: Magnetic resonance imaging of facial nerve neuromas. Laryngoscope. 101(1 Pt 1):31-5, 1991
                                                                          17. Inoue Y et al: Facial nerve neuromas: CT findings. J Comput Assist Tomogr. 11(6):942-7, 1987