[Cogan syndrome or sarcoidosis?].

Introduction: The Cogan's syndrome is characterized by the association of vestibulo-auditory dysfunction, non syphilitic interstitial keratitis or another significant inflammatory eye lesion. Some authors consider this disease as a vasculitis, because it is frequently associated with systemic manifestations. Based on Cogan's diagnostic criteria, Cogan's syndrome may be part of other systemic diseases, as polyarteritis nodosa or Wegener's granulomatosis.

Exegesis: We report the case of a patient who presented with a Cogan's syndrome and developed further sarcoidosis.

Conclusion: If Cogan's syndrome is characterized as systemic disease because of its association with aortitis or other vasculitis, on the other hand, clinical presentation may be part of many other systemic diseases.