Fig. 51.21.

Axial T2-weighted (A), coronal T1-weighted inversion recovery (B), fluid-attenuated inversion recovery (FLAIR), axial (C), and coronal (D) images from two patients with Rasmussen’s encephalitis (A, B and C, D respectively) involving the right hemisphere. The progressive atrophy usually involves initially the insular-opercular regions, as seen in these patients. Sometimes, multiple cortical and subcortical foci of hyperintense FLAIR signal may be present, even in the initial stages of the disease, as in the patient shown in (C) and (D).