FIG 2. Case 6: 23-year-old woman with dysembryoplastic neuroepithelial tumor.

A, Coronal T2-weighted FSE MR image shows a hyperintense mass with no peritumoral edema (arrows).

B, No lesion is seen in the corpus callosum on initial T2-weighted MR image.

C, T2-weighted MR image obtained 7 days after initiation of vigabatrin shows a focal, ovoid, hyperintense lesion in the splenium of the corpus callosum (solid arrows). A central hypointense area (open arrow) is seen within the lesion, which probably indicates a spared part of the white matter.