Fig. 1

Etiology of Lennox–Gastaut syndrome was assumed due to various structural pathologies. Coronal PD-weighted image shows hippocampal sclerosis and atrophy of the temporal lobe, whereas the right superior temporal gyrus is swollen and white matter is hyperintense (A). The axial FLAIR (B) and corresponding DWI (C) show ictal swelling of the right parietal gyri with white matter edema and cortical diffusion restriction, while the contralateral gyri in the left hemisphere are atrophic. Coronal surface reformatting of the 3D FLAIR (D) shows how the ictal changes extend across the temporoparietal brain region. See again atrophy in the left hemisphere