Fig. 4.

Unilateral schizencephaly (type 2). MR images of a 4-year-old child with focal epilepsy and developmental delay. Axial T2-weighted (a, b) and coronal inversion recovery (c, d) images show a CSF cleft with closely opposed borders lined with polymicrogyria. There is also a small area of gliosis in the white matter of the contralateral paracentral lobule (arrowed on a). The septum pellucidum is absent and the fornices lie abnormally low (arrowed on d). No other brain abnormalities were present