TY - JOUR T1 - Hyperacute Ischemic Stroke Missed by Diffusion-Weighted Imaging JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1871 LP - 1875 VL - 20 IS - 10 AU - David Lefkowitz AU - Michael LaBenz AU - Steven R. Nudo AU - Robert E. Steg AU - John M. Bertoni Y1 - 1999/11/01 UR - http://www.ajnr.org/content/20/10/1871.abstract N2 - 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. ER -