PT - JOURNAL ARTICLE AU - Lefkowitz, David AU - LaBenz, Michael AU - Nudo, Steven R. AU - Steg, Robert E. AU - Bertoni, John M. TI - Hyperacute Ischemic Stroke Missed by Diffusion-Weighted Imaging DP - 1999 Nov 01 TA - American Journal of Neuroradiology PG - 1871--1875 VI - 20 IP - 10 4099 - http://www.ajnr.org/content/20/10/1871.short 4100 - http://www.ajnr.org/content/20/10/1871.full SO - Am. J. Neuroradiol.1999 Nov 01; 20 AB - Summary: 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.