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Idiopathic Intracranial Hypertension (IIH)

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Idiopathic intracranial hypertension (IIH) is a condition characterized by high pressure in the fluid around the brain with no identifiable cause. Its alternate name of pseudotumor cerebri comes from its symptoms (including headache, blurred or double vision, ringing in the ears), which are similar to those of a brain tumor. But IIH is not a brain tumor — the presence of a tumor or other condition must be ruled out in order to make the diagnosis.

For more information, visit our Pseudotumor Cerebri page

See also: New Clinical Trial for Pseudotumor Cerebri
Video of Dr. Patsalides explaining the clinical trial

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Reviewed by: Srikanth Boddu, MD, MSc
Last reviewed/updated: August 2020
Illustrations by Thom Graves, CMI