Patients with suspected Idiopathic Intracranial Hypertension (IIH) will be recruited and undergo an ophthalmologic investigation, and a lumbar puncture, both of which are necessary for diagnosis of IIH. MRI is done as a standard of care to rule out other etiologies of raised intracranial pressure. Our patients will require four MRI/MRVs. The first MRI/MRV is standard of care scan. The second MRI/MRV will be on the day of the lumber puncture, immediately following the procedure. The third MRI/MRV will take place when significant reduction of clinical papilledema has taken place (about 3-6 months), and a forth MRI will take place one year after the initial presentation or with symptom resolution, whichever comes first. Radiological findings will be compared at all stages to determine if transverse venous sinus stenosis can be reversed with standard of care medical treatment.
