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Audiologic diagnostics of vestibular schwannoma

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Author(s): Komazec Zoran | Lemajić Slobodanka N. | Vlaški Ljiljana

Journal: Medicinski Pregled
ISSN 0025-8105

Volume: 57;
Issue: 1-2;
Start page: 81;
Date: 2004;
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Keywords: neuroma | acoustic | diagnosis | diagnostic techniques | otological | vestibular function tests

ABSTRACT
Introduction Vestibular schwannoma (acoustic neuroma) is a rare, but important cause of sensorineural hearing loss. Patients with asymmetric hearing loss, or unilateral tinnitus should be evaluated expeditiously, to prevent further neurological damage. Audiologic diagnostics Audiologic diagnostics represents the basic diagnosis for early detection of vestibular schwannoma. Patients with vestibular schwannomas may present with a variety of clinical features, including retrocochlear pattern of sensorineural hearing loss. Supraliminary audiometry, tympano- metry, stapedius reflex and otoacoustic emissions as well as vestibular response to caloric testing are methods for selection of patients with suspicion of this tumor. Conclusion The golden standard for audiologic diagnostics of vestibular schwannoma is BAEP (Brainstem Auditory Evoked Potentials). Patients with pathological findings of BAEP should undergo MRI of the posterior fossa. Gadolinium-enhanced magnetic resonance imaging is the best and final tool for making a diagnosis of vestibular schwannoma.
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