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박헌이(Hun Yi Park),김성헌(Sung Huhn Kim),이종대(Jong Dae Lee),손은진(Eun Jin Son),이호기(Ho-Ki Lee),이원상(Won-Sang Lee) 대한두개저학회 2006 대한두개저학회지 Vol.1 No.1
This study was performed to investigate the capability of preoperative evaluations in predicting the precise anatomic origin of intracanalicular tumors. We conducted a retrospective case review of 11 patients (8 male, 3 female; 26-70 yr of age) with intracanalicular tumors that were treated surgically. Data included preoperative pure tone audiogram, auditory brainstem response, caloric test, electroneurographies and temporal MRIs. Postoperatively, facial nerve schwannomas were diagnosed pathologically in two of 11 patients (18%). There were no clues suggesting facial nerve schwannoma in preoperative evaluations: 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 to predict precisely the origins of intracanalicular tumors. These emphasize the need to fully inform the patient preoperatively.