Figure 1: Axial fluid-attenuated inversion-recovery (FLAIR) images shows hyperintense lesions (white arrows) around the fourth ventricle (a), the periaqueductal area (b), and the third ventricle (c and d). Review FLAIR images shows the previous lesion around the fourth ventricle (e), the periaqueductal area (f), and the third ventricle (g and h) disappeared