FIG 1. Images of patient 4.

A, Axial FLAIR image shows a large bilateral cavitary lesion containing CSF-like fluid with a thick wall in the frontal white matter. The cortical sulci of bifrontal lobes are dilated mildly. The cavum septum pellucidum is also observed.

B, Midsagittal T1-weighted image shows markedly atrophic genu of the corpus callosum.