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Diffusion-Negative Stroke:A Report of Two Cases AJNR 20:1876-1880, Wang,P.Y-K.,et al, 1999 See this aricle in Pubmed Article Abstract Diffusion-weighted MR imaging is generally thought to be highly sensitive for the diagnosis of acute stroke. We report two cases of hyperacute stroke with absence of changes on diffusion-weighted images within 4 hours of symptom onset. Fo llow-up studies, performed 4 days later, showed infarction in regions compatible with the clinical presentation and (in one case) with the initial perfusion deficit. These cases indicate that normal findings on diffusion-weighted images in patients with suspected cerebral ischemia do not rule out impending infarction.

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(click to filter results - removes previous filter) cerebral infarction cerebrovascular accident MRI MRI,early changes in CVA MRI,false negative

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