Fig. 3
Brain MRI performed 1 month after clinical onset. a-d Axial diffusion weighted images show resolution of the signal abnormalities along the ventricular ependyma and reduction of the ventricular size after bilateral shunting procedures (asterisks). Axial contrast-enhanced FLAIR (e-h) and T1-weighted (i-j) images demonstrate marked reduction of the periventricular white matter signal alterations (thick arrows), and almost complete resolution of leptomeningeal contrast enhancement with re-expansion of the subarachnoid spaces. Note the presence of mild reactive dural contrast enhancement in the temporo-frontal regions (arrowheads)