The appearance of numerous minute cortical areas characterized by hyperintense signal in DWI and low ADC is highlighted on the left in the posterior areas of the insular lobe, in the postero-lateral frontal lobe and parieto-occipital mesial region and some also on the right in the frontal and parietal lobe, in the mesial temporal region and periventricular seat as well as in both cerebellar hemispheres.
MR angiography shows a slight reduction in the caliber of proximal anterior and middle cerebral arteries as well as the supraclinoid portion of the internal carotid arteries which present fine marginal irregularities.
Persistent focal meningeal involvement in the left parieto-temporal region.