A small vestibular schwannoma arising from the inferior vestibular nerve

The investigation of a complaint of unilateral right sensorineural hearing loss led to the identification of a right 3 mm vestibular schwannoma arising from the inferior division of the right vestibular nerve. On investigation the patient was found to have normal caloric function, this being mediate...

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Bibliographic Details
Published in:Journal of laryngology and otology 2003-06, Vol.117 (6), p.498-500
Main Authors: Baguley, D. M., Jones, S. E. M., Moffat, D. A.
Format: Article
Language:English
Subjects:
(RF) Otorhinolaryngology
Biological and medical sciences
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Gadolinium
Hearing Loss - etiology
Hearing Loss Sensorineural
Humans
Magnetic Resonance Imaging - methods
Male
Medical sciences
Middle Aged
Neuroma Acoustic
Neuroma, Acoustic - diagnosis
Otorhinolaryngology. Stomatology
Tumors
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Summary:The investigation of a complaint of unilateral right sensorineural hearing loss led to the identification of a right 3 mm vestibular schwannoma arising from the inferior division of the right vestibular nerve. On investigation the patient was found to have normal caloric function, this being mediated by the superior vestibular nerve. Both transient and distortion product otoacoustic emissions were absent in the right ear, and ABR was abnormal on this side. These findings are of interest as they indicate that this small lesion produced a hearingloss that was both cochlear and retrocochlear. The anatomical finding that the medial auditory efferents run within the inferior vestibular nerve is considered. This patient did not experience tinnitus or hyperacusis despite the site of the lesion arising from the inferior vestibular nerve.
ISSN:0022-2151
1748-5460
DOI:10.1258/002221503321892398