Idiopathic intracranial hypertension (IIH) is an uncommon condition involving an increase in intracranial pressure in the brain of unknown cause. It goes by a couple of other aliases, including pseudotumor cerebri, due to the signs and symptoms mimicking a brain tumor (“pseudotumor” means “false brain tumor”), and benign intracranial hypertension. It is estimated that about 100,000 Americans suffer from IIH.
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