XXXX in the absence of magnetic resonance imaging abnormalities.

@entity1 @entity16 @entity10 @entity2287 @entity5325
BACKGROUND: @entity5325 ( @entity5325 ) is a @entity16 of unknown etiology, characterized by features of low cerebral spinal fluid (CSF) pressure, postural @entity10 and magnetic resonance imaging (MRI) abnormalities. METHODS: Four symptomatic cases of @entity5325 presented to our institution over a six-month period. Magnetic resonance imaging studies were performed in all four cases. Diagnostic lumbar puncture was done in all except one case. RESULTS: All of the @entity1 on whom lumbar punctures were performed demonstrated low CSF pressure and CSF protein elevation with negative cultures and cytology. Three out of the four @entity1 exhibited MRI findings of diffuse spinal and intracranial pachymeningeal @entity2287 enhancement and extradural or subdural fluid collections. One @entity1 had no MRI @entity10 and reduced CSF pressure at lumbar puncture. All @entity1 recovered with intravenous fluids and conservative treatment. CONCLUSIONS: Magnetic resonance imaging abnormalities are found in most, but not all @entity1 , with @entity5325 . Cerebral spinal fluid abnormalities can be detected even in @entity1 with normal MRI studies. It is important to recognize the variability of imaging results in this usually benign disorder.
