Clinical features and outcome of Cogan syndrome.

To review the clinical features of Cogan syndrome, a rare vasculitis characterized by systemic, ocular, and audiovestibular symptoms.Clinical records of patients with Cogan syndrome followed at 2 pediatric rheumatology institutions and those from a database search were reviewed. Data included clinical features at onset and during the disease course, treatments, and outcomes.Twenty-three children with Cogan syndrome (15 males; mean age, 11.4 years [range, 4-18 years]) were included in the analysis. Eleven patients (47.8\%) exhibited systemic features at disease onset, including fever, arthralgias-arthritis or myalgias, headache, and weight loss. Twenty-one patients (91.3\%) had ocular symptoms, due mainly to interstitial keratitis, uveitis, or conjunctivitis/episcleritis. Vestibular symptoms (39.1\%) included vertigo, vomiting, and dizziness. Auditory involvement (65.2\%) consisted of sensorineural hearing loss, tinnitus, and deafness. Four patients had cardiac valve involvement, and 3 had skin manifestations. After a median 2 years of follow-up, 30.4\% of the patients were in clinical remission, but all others had irreversible complications (deafness, 21.7\%; sensorineural hearing loss, 13.0\%; vestibular dysfunction, 4.3\%; ocular complications, 13.0\%; cardiac valve damage, 17.4\%).Audiovestibular and ocular involvement have a major impact on prognosis in children with Cogan syndrome.