Axial MRI DWI image (b=1000) at initial presentation shows symmetric areas of increased signal in bilateral centrum semiovale, bilateral frontoparietal periventricular and deep white matter, as well as in the corpus callosum and bilateral middle cerebellar peduncles, with corresponding low signal on the ADC map suggestive of restricted diffusion. No abnormal FLAIR signal was noted in these areas. The abnormal areas are isointense to the white matter on T1W images and do not show any contrast enhancement in the post-contrast T1W images (not shown).