objectives upon completion of this presentation, participants will be able to: 1) recognize mri appearance of the spontaneous intracranial hypotension and idiopathic intracranial hypertension (pseudotumor cerebri). 2) review their various clinical and imaging presentations. conclusions in this presentation we will review imaging presentations of our several proved cases. as mentioned, there are...

BACKGROUND AND PURPOSE Atypical clinical presentations of spontaneous intracranial hypotension include obtundation, memory deficits, dementia with frontotemporal features, parkinsonism, and ataxia. The purpose of this study was to compare clinical and imaging features of spontaneous intracranial hypotension with typical-versus-atypical presentations. MATERIALS AND METHODS Clinical records and...

Although few patients with spontaneous intracranial hypotension develop cerebral venous thrombosis, the association between these two entities seems too common to be simply a coincidental finding. We describe two cases of spontaneous intracranial hypotension associated with cerebral venous thrombosis. In one case, extensive cerebral venous thrombosis involved the superior sagittal sinus and mul...

The association of spontaneous intracranial hypotension with cerebral venous sinus thrombosis is rare. We report here a case of extensive cerebral venous sinus thrombosis involving three sinuses following spontaneous intracranial hypotension. The patient presented no other thrombotic risk factors except for spontaneous intracranial hypotension. This case adds to the evidence that spontaneous in...

The outcome of spontaneous intracranial hypotension has been unpredictable. The results of initial MRI were correlated to outcome of treatment in 33 patients with spontaneous intracranial hypotension. A good outcome was obtained in 25 (97%) of 26 patients with an abnormal MRI vs only 1 (14%) of 7 patients with a normal MRI (p = 0.00004). These findings show that normal initial MRI is predictive...

The imaging characteristics of spontaneous intracranial hypotension have been well described in the clinical and imaging literature. We present a case of spontaneous intracranial hypotension with typical clinical and laboratory features that were thought to be suspicious for a ruptured aneurysm. Blood in the CSF in conjunction with headaches led to cerebral angiography that showed diffuse enlar...

From the Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan; Department of Anatomy and Cell Biology, National Taiwan University College of Medicine, Taipei, Taiwan. Received January 10, 2005. Revised and Accepted January 21, 2005. Reprint requests and correspondence to: Sung-Tsang Hsieh. MD. Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan. ...

Spontaneous intracranial hypotension (SIH) is an increasingly recognised syndrome. Postural headache with typical findings on magnetic resonance imaging (MRI) are the key to diagnosis. Orthostatic headache, low cerebrospinal fluid opening pressure, and diffuse meningeal enhancement on post-contrast T1-weighted MRI brain studies are the major features of this increasingly recognised syndrome. He...