Progressive late-onset sensorineural hearing loss and vestibular impairment with vertigo (DFNA9/COCH): longitudinal analyses in a belgian family.
SourceOtology & Neurotology, 24, 5, (2003), pp. 743-748
Article / Letter to editor
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Otology & Neurotology
SubjectUMCN 3.3: Neurosensory disorders
OBJECTIVE: To evaluate audiometric and vestibular signs and symptoms in a new DFNA9 family. SETTING: Tertiary referral centers. METHODS: A multigeneration Belgian family with late-onset progressive sensorineural hearing loss and concomitant ves-tibular impairment with an autosomal dominant pattern of inheritance underwent clinical and genetic evaluation. Medical history was recorded. Blood samples were taken for genetic linkage and mutation analyses. Pure-tone audiometry, speech audiometry and vestibular examinations were performed. Onset and progression in hearing impairment were evaluated with linear regression analysis of longitudinal threshold-on-age data. RESULTS: Linkage to DFNA9 was confirmed and mutation analysis revealed a P51S mutation in the COCH gene. Several patients had a Meniere's-like presentation. All patients developed late-onset progressive sensorineural hearing loss eventually leading to severe deafness and vestibular failure.
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