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  • Title: [Neurootologic study of acoustic neuroma].
    Author: Wang WQ, Wu LW.
    Journal: Lin Chuang Er Bi Yan Hou Ke Za Zhi; 2000 Apr; 14(4):149-51. PubMed ID: 12541485.
    Abstract:
    OBJECTIVE: To summarize the outcome of neurootologic examination of acoustic neuroma and study of diagnostic significance of neurootologic examination on acoustic neuroma. METHOD: 13 patients were examined with pure tune test, acoustic immittance, electronystagmography, acoustic brainstem evoked response, electrocochleogram, otoacoustic emissions and facial electroneurography. RESULT: All patients had subjective hearing loss. One patient had normal pure tone audiogram, other 4 patients had normal pure tone test at the frequency < 2000 Hz. The outcome of acoustic immittance is various. 5 patients were normal in caloric test, but all were abnormal in visual-vestibular optokinetic response. ABR are positive in 90.9% of cases, but 2 patients had no response. 7 patients were abnormal in facial electroneurography, 3 (of 3) eletrocochleogram and 2 (of 2) otoacoustic emissions revealed retrocochlear pathology. CONCLUSION: Neurootologic examination played important role in filtering diagnosis of acoustic neuroma, results should be considered synthetically, acoustic neuroma should not be ruled out if any one test was negative.
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