Vestibular dysfunction in patients with post-mumps sensorineural hearing loss.

OBJECTIVE: To study the possible damage to the vestibular system in patients with post-mumps sensorineural hearing loss. METHODS: Nineteen patients with recent mumps infection participated in the study. All patients had unilateral profound sensorineural hearing loss or total hearing loss. Patients were subjected to video-nystagmography and vestibular-evoked myogenic potential testing. RESULTS: Eight patients (42.1 per cent) had normal video-nystagmography results and intact vestibular-evoked myogenic potentials on both sides, whereas the other 11 patients (57.9 per cent) had vestibular lesions in the form of marked canal weakness and absent vestibular-evoked myogenic potential responses on the same side as hearing loss. The overall findings indicated a peripheral site for the lesions. CONCLUSION: The majority of patients with post-mumps sensorineural hearing loss had peripheral vestibular pathology in the same ear as hearing loss. Further research should be directed to saving the inner ear following mumps infection.