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  • Title: Hyperacute ischemic stroke missed by diffusion-weighted imaging.
    Author: Lefkowitz D, LaBenz M, Nudo SR, Steg RE, Bertoni JM.
    Journal: AJNR Am J Neuroradiol; 1999; 20(10):1871-5. PubMed ID: 10588111.
    Abstract:
    We present two cases of hyperacute ischemic stroke that were initially missed by diffusion-weighted imaging; abnormalities in locations corresponding to focal neurologic deficits were discovered by MR angiography and perfusion-weighted imaging. Within hours, follow-up diffusion-weighted scans revealed partial conversion of the hypoperfused regions to complete stroke. These cases illustrate the potential for a nonresolving stroke-in-evolution to go undetected by diffusion-weighted imaging at hyperacute timepoints.
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