A rare genetic syndrome with cerebellar malformation as a major feature. Characteristics included cerebellar vermis hypo or aplasia, ventriculomegaly, agenesis of corpus callosum and abnormalities of the brainstem and cerebral cortex in association with ocular coloboma. Clinically, patients show hydrocephalus at birth, neonatal hypotonia with abnormal breathing pattern, and ocular abnormalities with impaired vision, severe psychomotor delay, and seizures. [from
SNOMEDCT_US]