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FIG 1. Signal characteristics of PML.
A and B, Axial MR studies show low-signal-intensity lesions on T1-weighted (533/25/1) image (A) and hyperintense lesions on T2-weighted (2000/80/1) image (B) in the centrum semiovale bilaterally, subcortical white matter, and corpus callosum. Note the asymmetrical white matter involvement, with the left cerebral hemispheric white matter more severely affected.
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