Emerging Areas of Interest y Diagnosis is based upon: ◦ History of invasive procedure (LP for example) ◦ Positional headache relieved by laying down ◦ MRI of the brain with contrast x Diffuse thickening of the pachymeninges with contrast enhancement x Subdural fluid collections x Subdural hematomas
x Downward displacement of the cerebellar tonsils x Often misdiagnosed as a Chiari I malformation ◦ CT myelography for specific leak site location ◦ Radionuclide cisternography gives broader view but less specific on site location ◦ Low CSF pressure on LP (<60mm of H20) [Norm: 65-195 mm]
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