Bilateral thalamic vasogenic edema seen as hyperintensity on both axial FLAIR (a) and coronal T2-weighted (b) imaging due to venous thrombosis of the deep cerebral venous system. The venous thrombosis of the vein of Galen is seen as hyperintensity on sagittal unenhanced T1-weighted imaging (c), and lack of flow in the deep cerebral venous system is seen on MR venography (d).
