MRI and Brainstem Auditory Evoked Potential Evidence of Eighth Cranial Nerve Involvement in Multiple Sclerosis

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Abstract
An MS patient experienced sudden hearing loss.Brain-stem 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. NEUROLOGY 1997;48: 270-272

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