Idiopathic Intracranial Hypertension (Benign Intracranial Hypertension; Intracranial Venous Hypertension; Pseudotumor Cerebri) By Stephen D Silberstein, MD, Sidney Kimmel Medical College at Thomas Jefferson University Reviewed / Revised Apr 2023 View Patient Education Symptoms and Signs Diagnosis Treatment Key Points Topic Resources Conditions Associated With... Idiopathic intracranial hypertension causes increased intracranial pressure without a mass lesion or hydrocephalus, probably by obstructing venous drainage; cerebrospinal fluid composition is normal.