While overweight and female gender play an undisputable role in the pathogenesis of idiopathic intracranial hypertension (IIH), the contribution of other factors is still unclear. We have evaluated the laboratory findings of patients with IIH in an attempt to find the influence of abnormalities on the disease course. Included were 82 females after menarche and males older than 18 years who were followed up for at least 1 year. A wide range of laboratory parameters were examined at the time of presentation. The most frequent abnormal laboratory findings were elevated C reactive protein (CRP) (51 %), thrombophilia (31 %), increased plasma cortisol levels (29 %) and elevated lactate dehydrogenase (LDH) (20 %). Patients with elevated CRP and patients with thrombophilia had an unfavorable visual outcome. Increased cortisol levels and abnormal calcium correlated with a higher rate of recurrence. The visual outcome of patients with elevated LDH was better than those with normal LDH. It seems that certain metabolic, inflammatory and coagulation abnormalities may influence the course of IIH. If confirmed in further studies, these findings could contribute to elucidation of the etiology and prognosis of IIH.
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