FIG 5. Lissencephaly and cerebellar hypoplasia in a 4-day-old neonate.

A, Sagittal spin-echo (550/11) image shows complete cerebral lissencephaly and a very small cerebellum. The brain stem is abnormally thin. The colliculi are fused.

B, Axial spin-echo (550/16) image shows the very small cerebellar hemispheres and the small pons with a central cleft, presumably due to absence of the crossing ventral pontine axons.