TABLE 1.

Modified Dandy criteria for the diagnosis of idiopathic intracranial hypertension

1- Signs and symptoms of increased intracranial pressure (headaches, nausea, vomiting,  transient visual obscurations, papilledema).

2- No localizing, focal neurologic signs, except unilateral or bilateral sixth nerve paresis.

3- Cerebrospinal fluid opening pressure ≥ 25 cm of water*, but without cytologic or  chemical abnormalities.

4- Normal neuro-imaging adequate to exclude cerebral venous thrombosis, i.e., magnetic  resonance imaging of the brain, often with additional sequences (computed  tomography or magnetic resonance venography).

^*The number of 25 cm of water is not an absolute cutoff, especially in children in whom cerebrospinal fluid opening pressure as high as 28 cm of water have been documented to be normal [20].