FIG 2. Type 2 disrupted cerebellar development in a preterm infant born at 26 + 3 gestational weeks.

A–C, Sagittal follow-up sonograms obtained on days 57 (A), 86 (B), and 106 (C) of life show a vanishing cerebellar vermis with successive enlargement of the fourth ventricle.

D, MR image obtained at 15 weeks.