Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Controlled Clinical Trial
No signs of intracranial arterial vasoconstriction in transient global amnesia.
The current theories to explain the pathophysiology of transient global amnesia (TGA) involve epilepsy, migraine, and hippocampal ischemia which might be determined by venous congestion or arterial vasoconstriction triggered by Valsalva-associated maneuvers in susceptible individuals. ⋯ Extra-intracranial atherosclerosis does not play a pathogenic role in TGA and no supporting evidence for the arterial vasoconstriction hypothesis of TGA emerged from this study.
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Case Reports
Iatrogenic pseudoaneurysm of the middle meningeal artery after external ventricular drain placement.
External ventricular drain (EVD) placement is often a routine but lifesaving neurosurgical procedure performed throughout the world. Misadventures involving the procedure are well documented throughout the literature. However, we present a unique case of middle meningeal artery pseudoaneurysm formation after EVD placement not before described and provide a review of the literature.
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Basilar artery stenosis where flow restriction constitutes the main pathomechanism are exceptional. Here, we report a case where the lesion progression was characterized by watershed infarct between the anterior inferior-superior cerebellar arteries and deep pontine arteries, indicating a significant hemodynamic impairment.
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We report two cases of posterior reversible encephalopathy syndrome (PRES) occurring in association with supra-therapeutic serum lithium levels. Although the neurologic manifestations of lithium toxicity are well known, this is, to our knowledge, the first report describing a link between lithium toxicity and PRES. We discuss the current understanding of the pathogenesis of PRES and suggest mechanisms by which lithium may play a role in its development.