Fig. 1

Brain MRI. Brain MRI summary—Axial views, Images a, b, c are images taken on initial presentation. Images d, e, f were taken at his second visit). Arrowhead: Generalized perivascular enhancement in the supratentorial brain during the second admission relative to first admission. There is faint non-specific enhancement in the periventricular regions and pachymeninges. There is progressive patchy prolongation in the white matter as well as deep gray matter structures. Blue arrows point to new infiltrates that were biopsied