Journal of the neurological sciences · 2013
Differentiating cerebellopontine angle meningioma from schwannoma using caloric testing and vestibular-evoked myogenic potentials.
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Su Chia-Hung, Chen Chang-Mu, Young Yi-Ho
Аннотация
OBJECTIVE: This study utilized audiometry, and caloric, ocular vestibular-evoked myogenic potential (oVEMP) and cervical VEMP (cVEMP) tests to differentiate between cerebellopontine angle (CPA) meningioma and schwannoma.
PATIENTS AND METHODS: Eleven CPA meningioma patients with mean tumor size 2.8±1.4 cm and another 11 CPA schwannoma patients with mean tumor size 2.7±1.0 cm were enrolled in this study. All patients underwent a battery of audiovestibular function tests.
RESULTS: The two groups did not differ significantly in terms of clinical manifestation. The abnormal percentage of caloric test in the meningioma group was 36%, compared to 91% in the schwannoma group, and thus both groups differed significantly. However, such difference was not observed between the two groups regardless of mean hearing level, oVEMP test and cVEMP test.
CONCLUSION: Combined caloric with oVEMP test results may help differentiate a CPA tumor. Correlation between the caloric and oVEMP test results in a CPA tumor indicates a schwannoma nature, while dissociation between the caloric and oVEMP test results depicts a meningioma character.
PATIENTS AND METHODS: Eleven CPA meningioma patients with mean tumor size 2.8±1.4 cm and another 11 CPA schwannoma patients with mean tumor size 2.7±1.0 cm were enrolled in this study. All patients underwent a battery of audiovestibular function tests.
RESULTS: The two groups did not differ significantly in terms of clinical manifestation. The abnormal percentage of caloric test in the meningioma group was 36%, compared to 91% in the schwannoma group, and thus both groups differed significantly. However, such difference was not observed between the two groups regardless of mean hearing level, oVEMP test and cVEMP test.
CONCLUSION: Combined caloric with oVEMP test results may help differentiate a CPA tumor. Correlation between the caloric and oVEMP test results in a CPA tumor indicates a schwannoma nature, while dissociation between the caloric and oVEMP test results depicts a meningioma character.