What is idiopathic intracranial hypertension (IIH)?

Johns Hopkins Medicine
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Idiopathic intracranial hypertension is the name given to a condition characterized by severe headaches and swelling of the optic nerve caused by increased pressure in the fluid surrounding the brain. It is sometimes called pseudotumor cerebri (PTC) syndrome.

Frequently, the patient will initially be evaluated for a brain tumor because the symptoms of IIH are so closely related to those of a brain tumor. However, it should quickly become apparent from imaging scans like MRI or CT, that a brain tumor is not the issue.

Patients with IIH or PTC may present with any of the following symptoms:

  • Chronic, severe headaches
  • Ringing in the ears
  • Blurred vision
  • Tunnel vision
  • Loss of vision
  • Double vision
  • Papilledema (swelling of the optic disc)

Continue Learning about Pseudotumor Cerebri

Pseudotumor Cerebri

Pseudo tumor cerebri (SOO-doh-too-mur SER-uh-bry) is a term that describes an increase of pressure inside your skull that happens for no obvious reason. Symptoms are similar to those of a brain tumor but there is no tumor. Symptom...

s may include a headache behind your eyes, ringing in your ears, nausea, vomiting, dizziness, blurred vision or double vision.The cause of pseudo tumor cerebri is unknown, but it is thought to be linked to an excess amount of cerebrospinal fluid within your skull. Some people can become blind as a result of the increased pressure in their skulls. If you have symptoms, you should see your doctor to rule out a brain tumor and to treat your symptoms.
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