[Cogan's syndrome revealed by haemorrhagic glairous diarrhoea]. / Syndrome de Cogan révélé par une diarrhée glairo-sanglante.

INTRODUCTION: Cogan's syndrome is defined by the combination of non syphilitic interstitial keratitis and inner ear dysfunction, similar to Meniere's disease. OBSERVATION: Cogan's syndrome was revealed by haemorrhagic glaireous diarrhoea in a 21 year-old woman whose medical history included Hirschsprung's disease. Cerebral MRI revealed viral-like bilateral neuritis of the eighth cranial nerve, never described in the literature before. The auditory and visual disorders regressed after treatment with corticosteroids. CONCLUSION: The early diagnosis of Cogan's syndrome permits the cure of the visual and auditory and notably inner ear symptoms with corticosteroid therapy.