There is severe dilatation of the lateral ventricles, but the 3rd and 4th ventricles are non-dilated. Aqueduct not visualised, possibly due to orientation of the brainstem on these images. Corpus callosum is severely thinned. Cerebellar vermis present, but abnormal in shape suggesting mild dysplasia.
There is ventral kinking of the brainstem at the pontomesencephalic junction, as well as exaggerated dorsal kinking at the cervico-medullary junction.