MRI and brainstem auditory evoked potential evidence of eighth cranial nerve involvement in multiple sclerosis |
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Authors: | R Bergamaschi A Romani F Zappoli M Versino V Cosi |
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Affiliation: | Multiple Sclerosis Center, Pavia, Italy. |
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Abstract: | An MS patient experienced sudden hearing loss. Brainstem auditory evoked potentials, previously normal, showed substantial abnormalities that suggested the impairment of the distal part of the acoustic nerve. MRI detected a small hyperintense lesion along the acoustic nerve; the lesion decreased in size and then disappeared after steroid treatment. This demonstrates that a demyelinating lesion in the distal tract of the eighth cranial nerve may cause an acute hearing loss in MS. |
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