Fig. 1

Brain diffusion-weighted magnetic resonance imaging (MRI-DWI) in case 1 (a) and case 2 (b). a Brain MRI findings (axial; diffusion-weighted images) of case 1 (first hemiplegic episode). Cortical restricted diffusion signals were seen predominantly in the right frontal and parietal lobe during the episode of left hemiplegia. b Brain MRI findings (axial; diffusion-weighted images) of case 2. Mild hyperintensity was seen in the left hemispheric cortex during the episode of right hemiplegia