Idiopathic intracranial hypertension
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Chronic headache, upper and lower limb numbness.
Prominent CSF within the subarachnoid space around the tortuous optic nerves.
Flattening of the posterior sclera (papilledema).
Enlarged partially empty sella turcica.
Enlarged Meckel’s caves.
Prominent arachnoid pits/small meningoceles in the middle cranial fossae.
Idiopathic intracranial hypertension is considered when such typical findings are encountered, after other causes of elevated CSF pressure (e.g. tumors, hydrocephalus, dural sinus thrombosis) are excluded.