MRI
Axial T1
Axial T2
Axial FLAIR
Axial T1 C+
Sagittal T1 C+
Axial DWI
Axial ADC
MRI shows well-defined round intra-axial lesions T1 hypointense and T2 hyperintense in the right and left frontal subcortical white matter. The lesions have a thick wall with dual rim sign best seen on T2WI, ring enhancement in post-contrast T1. The lesions show true restricted diffusion on DWI images (low signal on ADC). There is important perilesional edema.