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We identified seven patients with clinically diagnosed ischemic stroke and negative brain MRI scan.Six of seven patients were scanned within 7 days of symptom onset and two patients within 24 hours.One patient was scanned 3 months after symptom onset.The strokes not detected by MRI were clinically localized to the cortex(n=3),brain stem(n=3),and subcortical/ lacunar area(n=1).One patient underwent two MRI scans,one with gadolinium. Conclusions:These cases,while selected,illustrate some potential limitations of MRI for diagnosing stroke. |
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