Sagittal SPGR T1WI (repetition time msec/echo time msec/inversion time msec, 13/5/500) redemonstrating multiple midline brain abnormalities including a thin, dysgenetic corpus callosum, brainstem hypoplasia, vermian hypoplasia (black arrow), and an interhypothalamic adhesion (small white arrow). A newly visible extra-axial hypointense structure is centered in the anterior cingulate sulci representing an epidermoid (white arrowhead). Vertebrobasilar ectasia is again shown, abutting and deforming the basis pontis (large white arrow). Normal C1 and C2 posterior elements are not identified on this midline sagittal image, consistent with hypoplasia (black arrowhead).