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67-old man with 45-min onset left hemiparesis Teaching NeuroImages Neurology Resident and Fellow Section © 2015 American Academy of Neurology.

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Presentation on theme: "67-old man with 45-min onset left hemiparesis Teaching NeuroImages Neurology Resident and Fellow Section © 2015 American Academy of Neurology."— Presentation transcript:

1 67-old man with 45-min onset left hemiparesis Teaching NeuroImages Neurology Resident and Fellow Section © 2015 American Academy of Neurology

2 Vignette 3.0-Tesla gadolinium-enhanced MRI (iodine contrast allergy) at admission: right frontoparietal small infarcts on diffusion-weighted images without vascular obstruction Complete spontaneous symptoms regression No reperfusion therapy was given Twenty-four hours later a second MRI and a CT were done © 2015 American Academy of Neurology Patroclo et al

3 Imaging © 2015 American Academy of Neurology Patroclo et al

4 Hyperintense Acute Reperfusion Marker (HARM) in Ischemic Stroke with Transient Symptoms HARM is an early and transient blood–brain barrier disruption sign caused by leakage of gadolinium-based contrast into the CSF Caution must be taken to avoid misinterpreting it as subarachnoid hemorrhage © 2015 American Academy of Neurology Patroclo et al

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