Fig 2.

Patient 1: A and B, Coronal T1-weighted images and axial T2-weighted images (T2WIs) show the “molar tooth” appearance of the elongated SCPs running laterally (arrows) and the dorsal band crossing the midline and likely joining the MCPs (arrowheads). C, Axial T2WI at the level of the MCPs, which appear small (white arrows). D, Axial T2WI at the level of middle pons. A “horizontal cleft” is visible, outlined by black arrowheads. The black star indicates the fourth ventricle. Note the small size of cerebellar hemispheres (CH) and the hypoplastic vermis (V).