====== Idiopathic Intracranial Hypertension ====== 
A.K.A. Pseudotumor Cerebri
=====Diagnostic Criteria=====
====Required for diagnosis of the Pseudotumor Cerebri Syndrome (PTCS)====

  - Papilledema
  - Normal neurological examination except for cranial nerve abnormalities
  - Neuro-imaging:
    - Normal brain parenchyma without evidence of hydrocephalus, mass, or structural lesion and no abnormal meningeal enhancement on MRI, with and without gadolinium, for typical patients (female and obese)
    - MRI, with and without gadolinium, and MR venography for others.
    - If MRI is unavailable or contraindicated, contrast-enhanced CT may be used
  - Normal CSF Composition
  - Elevated LP opening pressure (> 280 mm H20, 250 mm H20 if not sedated or obese)
====Suggestive of Pseudotumor====

===Three of the following MRI criteria===

  - Empty sella
  - Flattening of the posterior aspect of the globe
  - Distention of the perioptic subarachnoid space +/- o.n. tortuosity
  - Transverse venous sinus stenosis
===Other===

  * Headache
  * Transient visual obscurations
  * Pulse-synchronous tinnitus
  * Binocular diplopia
  * Neck, shoulder, or back pain
  * Improvement of symptoms after lumbar puncture

===== Grading Disc Edema =====

[[http://webeye.ophth.uiowa.edu/eyeforum/cases/papilledema-grading.htm|Eye Rounds]]



=====Source=====

Revised Diagnostic Criteria for the Pseudotumor Cerebri Syndrome in Adults and Children, Deborah I Friedman, MD Grant T. Liu, MD Kathleen B. Digre, MD, Presented at the North American Neuro-ophthalmology Society (NANOS) meeting, Snowbird, Utah, Feb. 12, 2013

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