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Intracanalicular facial nerve schwannoma.

Authors
Park, HY; Kim, SH; Son, EJ; Lee, HK; Lee, WS
Citation
Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology, 28(3):376-380, 2007
Journal Title
Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology
ISSN
1531-71291537-4505
Abstract
OBJECTIVE: To investigate the capability of preoperative evaluations in predicting the precise anatomic origin of intracanalicular tumors.



STUDY DESIGN: We conducted a retrospective case review.



SETTING: Tertiary referral center.



PATIENTS: A total of 11 patients (8 men and 3 women, 26-70 years old) with intracanalicular tumors who were treated surgically were included.



INTERVENTIONS: Pure-tone average, auditory brainstem response, caloric test, and temporal magnetic resonance imaging were done in all 11 patients. Electroneuronography has only been performed since 2003, and only 3 patients were evaluated.



MAIN OUTCOME MEASURE: Preoperative symptoms, pure-tone average, auditory brainstem response, caloric test, electroneuronography, and magnetic resonance imaging were compared between patients with facial nerve schwannomas and patients with vestibular schwannomas.



RESULTS: Postoperatively, facial nerve schwannomas were diagnosed pathologically in 2 (18%) of 11 patients. There were not any clues suggesting facial nerve schwannoma in preoperative evaluations.



CONCLUSION: A facial nerve schwannoma may be misdiagnosed as a vestibular schwannoma, especially when the tumor is confined to the internal auditory canal. There are no useful preoperative evaluation tools in predicting the precise nerve origin of intracanalicular tumors. These emphasize the need to fully inform the patient preoperatively.
MeSH terms
AdultAgedAudiometry, Pure-ToneCranial Nerve Neoplasms/pathology*Cranial Nerve Neoplasms/surgeryDiagnosis, DifferentialEar, InnerEvoked Potentials, Auditory, Brain Stem/physiologyFacial Nerve/pathology*Facial Nerve/surgeryFemaleHumansMagnetic Resonance ImagingMaleMiddle AgedNeurilemmoma/pathology*Neurilemmoma/surgeryNeuroma, Acoustic/pathologyOtologic Surgical ProceduresRetrospective Studies
DOI
10.1097/01.mao.0000265191.24131.ed
PMID
17414044
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Otolaryngology
AJOU Authors
박, 헌이
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