Fig 3.

Negative MR imaging findings. Axial and coronal 3D T1WI (A and C) and axial and coronal 3D FLAIR (B and D) in a 15-year-old boy with right frontal lobe epilepsy, nocturnal seizure predominance, and onset at 12 years. Absence of the 6 criteria and no minor sulcal abnormality were found. E, ¹⁸FDG-PET coregistered on MR imaging (axial section) allows recognition of a gyral hypometabolism corresponding to the anterior part of the right cingulate cortex (arrow). F and G, Histology slides show typical features of type 2b FCD with giant dysmorphic neurons in the cortex (double arrow) and balloon cells in the underlying white matter (arrowhead) (Klüver-Barrera, original magnification ×40).