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Figure 1: Brain MRI, axial and coronal T2-weighted images showing increased signal intensity (arrows) along the corticospinal (pyramidal) tracts in lateral funicules at the C1 level of the spinal cord (a) at the level of medullary pyramids (b) and in the left cerebral peduncle (c and d). On diffusion-weighted images (DWI) (e and f) hyperintense lesions are clearly visible in the left cerebral peduncle (arrows)

Figure 1: Brain MRI, axial and coronal T2-weighted images showing increased signal intensity (arrows) along the corticospinal (pyramidal) tracts in lateral funicules at the C1 level of the spinal cord (a) at the level of medullary pyramids (b) and in the left cerebral peduncle (c and d). On diffusion-weighted images (DWI) (e and f) hyperintense lesions are clearly visible in the left cerebral peduncle (arrows)