A 28 year-old HIV positive man presented with progressive cognitive and acute weakness, worst on the left.
(Top Left) Axial MRI T2-weighted scan: Note the area of increased signal in the right posterior limb of the internal capsule. (Top Middle and Right) Axial T2-weighted scans. Note the black flow voids - they are much larger than normal, especially in the right internal carotid/middle cerebral and basilar arteries. (Bottom Left) Diffusion-weighted image. Note the high signal bilaterally in the deep white matter denoting acute infarctions. (Bottom Middle and Right) Axial T1-Gad enhanced scans. Note again that the blood vessel that are clearly dilated, especially the right internal carotid/middle cerebral and basilar arteries.
Revised05/21/06.
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