Figure 5.

Band heterotopia. A, B: Axial T2W and coronal inversion-recovery images showing bilateral thick bands of heterotopia, isointense to cortical gray matter within the white matter. Note the pachygyria and small left cerebral hemisphere; C, D: Axial T2W and inversion-recovery images showing bilateral, symmetric, continuous, smooth, thick bands of gray matter (arrow) outlined by thin layers of white matter and seems like a “double cortex”. Note the very thin, smooth cerebral cortex with absent cortical sulci (lissencephaly).