PMC3992745_01
Axial fluid attenuated inversion recovery images (a, b) and coronal T2W images (c, d) show abnormal symmetrical hyper intensities in bilateral post-chiasmatic optic tracts (a), bilateral mamillary bodies (b, d), periaqueductal area (b, d) and in bilateral inferior colliculi (c), Postcontrast T1 sagittal image (e) and coronal T1W image (f), shows homogenous bilateral symmetric enhancement in mamillary bodies and in inferior colliculi
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F1
MRI brain revealed bilateral symmetrical hyper-intensities over the mammillary bodies and periventricular regions of the third ventricle, bilateral inferior colliculi on T2-weighted and fluid attenuated inversion recovery (FLAIR) images [Figure 1a, b, c and d] with homogenous enhancement postcontrast [Figure 1e and f] with no restriction on diffusion-weighted and apparent diffusion coefficient (ADC) images (ruling out ischemia/cytotoxic edema). In addition to these classic findings of WE, focal hyper-intensities were also observed in bilateral post-chiasmatic optic tract on FLAIR images [Figure 1a].
Follow-up T2W coronal image (a) and postcontrast T1W sagittal image (b), shows complete resolution of abnormal signals in mamillary bodies, inferior colliculi and in post-chiasmatic optic tracts
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F2
A follow-up MRI brain carried out after 1 month revealed complete resolution of MR signal intensities [Figure 2a and b].