Fig 4.

FCD IIb with a transmantle sign of the left superior frontal gyrus (bottom-of-sulcus dysplasia) in a 27-year-old man with right-sided sensory-motor seizures (patient 5). A, Reformatted 1-mm-thick coronal FLAIR section (arrow: transmantle sign of the FCD). B, Overlay of MPRAGE-based junction image abnormalities with z scores of  >4. C, Overlay of MP2RAGE-based junction image abnormalities with z scores of >4. The MP2RAGE-based junction image matches the signal abnormalities at the gray matter junction as a characteristic feature of FCD type II (D–F, magnified coronal, sagittal, and axial views).