A, Luxol fast blue stain at approximately 400×.
B, GRE T2-weighted image, TR = 500, TE = 11, FOV = 15 cm, matrix = 1024 × 1024, and section thickness = 1 mm. Type 4 cortical lesion. Involvement predominantly affects the subcortical U-fibers, resulting in a juxtacortical lesion extending into the cortex.