Figure 3-7.

Unilateral periventricular nodular heterotopia (A, arrow) with polymicrogyria in the adjacent cortex; two patients with bilateral periventricular nodular heterotopia (B, C); a patient with periventricular nodular heterotopia in the right temporal horn of the ventricle (D, arrow) and a large subcortical heterotopia extending to the posterior quadrant of the brain (E, F); three patients with different thickness of subcortical laminar heterotopia (double cortex), from thin and discontinuous bands (G, arrows) to continuous bands (H, arrows, I); three patients with different degrees of lissencephaly-agyria-pachygyria complex, from pachygyria (J), posterior agyria and anterior pachygyria (K), and diffuse lissencephaly (L).