Figure 3: (a) Gross photograph of the brain showing polymicrogyria. (b) Gross photograph of the ventral aspect showing transverse sulci in the infero-medial aspect, marked with arrows. (c) Serial slices following brain cutting showing dilatation of the occipital horns, marked with arrow. (d) Photomicrograph of the cerebrum showing neuronal hetertopia in subependymal location. (H and E X100)