Dr.Roopchand.PSSenior Resident AcademicDepartment of NeurologyTDMC, AlappuzhaNEURORADIOLOGY - IIH
INTRODUCTION: A disorder of unknown etiology. Affects young obese females Presents with features of raised ICT and  pap...
DIAGNOSTIC CRITERIA:   Modified Dandy criteria     Signs and symptoms of raised ICT     No localizing neurologic signs ...
PATHOPHYSIOLOGY:   Collapsible Dural venous sinuses   Increased arterial blood flow.   Obesity: increased intra abdomin...
ETIOLOGY: Exposure to or withdrawal of drugs. Systemic diseases Disruption of cerebral venous flow Certain endocrine o...
CRITERIA FOR INCLUDING A DRUG OR ADISEASE AS A CAUSE OF IIH:   Radhakrishnan et al..     At  least 2 cases should have b...
PNEUMOENCEPHALOGRAM:
CT FINDINGS: Optic nerve edema due to iih                                Slit like ventricles
MRI:
pappilloedema, enlarged perioptic csf spaces with mild tortuosity of optic nerves,empty sella , prominent suprasellar cist...
Posterior scleral flattening
Empty sella in IIH
Brain MRI (1.5Tesla). (a)Sagittal T2-weightedimageshowingempty sella(white arrow);(b) axial T2-weightedimageshowingbucklin...
Neuroradiology of idopathic Intracranial Hypertension
Neuroradiology of idopathic Intracranial Hypertension
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Neuroradiology of idopathic Intracranial Hypertension

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Neuroradiology of idopathic Intracranial Hypertension

  1. 1. Dr.Roopchand.PSSenior Resident AcademicDepartment of NeurologyTDMC, AlappuzhaNEURORADIOLOGY - IIH
  2. 2. INTRODUCTION: A disorder of unknown etiology. Affects young obese females Presents with features of raised ICT and papilledema. Otitic hydrocephalus – pre imaging era Pseudotumor ceribri – pneumatoencephalogram era Benign intracranial hypertension ? Vision Idiopathic intracranial hypertension.
  3. 3. DIAGNOSTIC CRITERIA: Modified Dandy criteria  Signs and symptoms of raised ICT  No localizing neurologic signs (exception of a unilateral or bilateral sixth nerve paresis)  CSF may show increased pressure, but no cytologic or chemical abnormalities.  Normal to small symmetric ventricles  Diagnostic lumbar puncture done with the patient in the lateral decubitus position.  MRI or MRV should be included to rule out intracranial venous sinus thrombosis.  Other causes of intracranial hypertension should be ruled out
  4. 4. PATHOPHYSIOLOGY: Collapsible Dural venous sinuses Increased arterial blood flow. Obesity: increased intra abdominal pressure.
  5. 5. ETIOLOGY: Exposure to or withdrawal of drugs. Systemic diseases Disruption of cerebral venous flow Certain endocrine or metabolic disorders
  6. 6. CRITERIA FOR INCLUDING A DRUG OR ADISEASE AS A CAUSE OF IIH: Radhakrishnan et al..  At least 2 cases should have been described  The reported cases should have met all the criteria for the diagnosis of IIH.  Intracranial dural sinus thrombosis should have been ruled out with reasonable certaintyRadhakrishnan K, Ahlskog JE, Garrity JA, Kurland LT. Idiopathic intracranialhypertension. Mayo Clin Proc. Feb 1994;69(2):169-80
  7. 7. PNEUMOENCEPHALOGRAM:
  8. 8. CT FINDINGS: Optic nerve edema due to iih Slit like ventricles
  9. 9. MRI:
  10. 10. pappilloedema, enlarged perioptic csf spaces with mild tortuosity of optic nerves,empty sella , prominent suprasellar cistern
  11. 11. Posterior scleral flattening
  12. 12. Empty sella in IIH
  13. 13. Brain MRI (1.5Tesla). (a)Sagittal T2-weightedimageshowingempty sella(white arrow);(b) axial T2-weightedimageshowingbuckling ofoptic nerveswith normalretro-orbitalstructures; (c)coronal T2-fatsaturatedimageshowingincreased CSFspacesaroundbilateral opticnerves; (d) T1post-contrastcoronal image

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