Abstract
Cogan's syndrome is a rare disorder of unknown origin characterized by inflammatory ocular disease (mainly interstitial keratitis) and audiovestibular symptoms (mainly acute-onset sensorineural hearing loss) in the setting of a negative work-up for syphilis. The diversity of the ocular and audiovestibular manifestations reported in the literature in atypical Cogan's syndrome should make one cautious before accepting the diagnosis as the disease may mimic various other systemic disorders. Systemic corticosteroids are always the most widely used and successful therapy. For patients requiring high and prolonged doses, additional immunosuppression is appropriate. Methotrexate is the first-line steroid sparing agent. However, patients without systemic disease or severe eye disease unmanageable by topical corticosteroids should not be subjected to protracted courses of corticosteroids or immunosuppressive agents, particularly when little gain in hearing is obtained with their use. The effect of TNF-alpha blockers was recently investigated. Infliximab might be an alternative therapy in cases of failure of corticosteroids and immunosuppressive therapy. However, treatment might be more effective when started at an early stage of the disease, when the lesions are still reversible.
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