Fig. 1

Brain MRIs obtained 14 days after the onset of initial symptom. A brain MRI obtained on admission (day 1) shows increased DWI/FLAIR signal in the left anterolateral temporal lobe, mainly along the cortex with edema (a, b, arrows). The follow-up brain MRI obtained on day 28 shows a newly appearing increased DWI/FLAIR signal in the right anterior temporal lobe, and posterior spread of the initial left temporal lesion along the cerebral cortex (compatible with classic stroke-like lesion). Note mild reduction in ADC values in the left anterior temporal cortex (c, arrowhead), suggesting ongoing regional metabolic derangements. ADC values in the left anterior temporal subcortical white matter is rather increased, suggesting the presence of vasogenic edema. A: DWI; B: FLAIR; C: ADC map