Fig. 2

MRI of the brain depicts hyperintense signal intensity changes in the basal ganglia on axial T2-weighted (a) and FLAIR (b) sequences. There is no suggestion of contrast uptake in the basal ganglia (c) while both optic nerves demonstrate enhancement (d) on SPGR-GAD sequence. T2-weighted para-sagittal orbital sections show hyperintensity in the right (e) and the left (f) optic nerves (arrows)