Idiopathic intracranial hypertension (IIH), sometimes called benign intracranial hypertension (BIH) or pseudotumor cerebri (PTC) is a neurological disorder that is characterized by increased intracranial pressure (ICP), in the absence of a tumor or other intracranial pathology. Explanation of terms The terms "benign" and "pseudotumor" have often been used for this disorder to make clear that the increased ICP is not caused by a tumor or malignancy. However, these terms belie the signifi ...
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Pseudotumor Cerebri Information Page
... Pseudotumor cerebri literally means "false brain tumor." It is likely due to high pressure caused by the buildup or poor absorption of cerebrospinal fluid in the subarachnoid space surrounding the bra...
Source: National Institute of Neurological Disorders and Stroke