Case #34

CT

• Numerous hyperattenuating foci in the cerebral and cerebellar white matter bilaterally with associated vasogenic edema

MRI

• Numerous enhancing lesions in the bilateral cerebral and cerebellar hemispheres, the cerebellar vermis, and the medulla, many of which are periventricular in location and extend to the ependymal surface of the ventricles
• The majority of these lesions demonstrate solid enhancement, though a few demonstrate peripheral enhancement
• Variable corresponding restricted diffusion
• Corresponding vasogenic edema and mass effect without midline shift or evidence of herniation or hydrocephalus