[Idiopathic intracranial hypertension: a rare case related to pregnancy].

We report the case of a 25-year old primipara whose pregnancy was complicated by idiopathic intracranial hypertension (ICHT) associated with visual impairment in the first quarter. She underwent lumboperitoneal shunt without obstetric consequences. This study aimed to determine the features of this rare pathological entity whose pathophysiological mechanism is poorly elucidated. It would be caused by poor absorption of cerebrospinal fluid (CSF) through the arachnoid granulations. Major risk factors are: obesity, polycystic ovary syndrome, thrombophilia and hyperfibrinolyse. Diagnosis is based on modified Dandy criteria after negative clinico-biological and radiological assessment. Visual prognosis is compromised, as in the case of « classical » ICHT. However, there is no risk for cerebral involvements which could be life-threatening. In addition, this disease does not influence pregnancy outcome. This said, rapid and effective treatment should be implemented in order to preserve visual function in these patients.