Abnormal FLAIR hyperintensity within the infundibulum, optic chiasm and extending into the suprasellar region and hypothalamus. Associated thickening and enhancement of the infundibulum. Confluent FLAIR hyperintensity within the right insular ribbon and posterior right perisylvian fissure. Diffuse patchy basal leptomeningeal enhancement. No beading of vessels on MRA to suggest a vasculitis.