There are innumerable variable-sized intra-axial brain lesions seen in both cerebral, cerebellar hemispheres and left pons with their epicentre close to the grey-white matter junction. They show hypointense signal on T1, hyperintense signal on T2 with hyperintense perilesional edema of variable amounts and intense post-contrast ring enhancement with facilitated diffusion in the center of the lesions.
The largest lesion appears lobulated and is seen in the right frontal lobe with significant perilesional vasogenic oedema causing mass effect upon the corpus callosum and the frontal sulci, which appear effaced, resulting in subfalcine herniation. Pending right-sided uncal herniation is noted.