Cerebellar Hypoplasia is related to cerebellar ataxia, impaired intellectual development, and dysequilibrium syndrome 1 and lissencephaly 2. An important gene associated with Cerebellar Hypoplasia is OPHN1 (Oligophrenin 1), and among its related pathways/superpathways are Neuroscience and Guidance Cues and Growth Cone Motility. Affiliated tissues include cerebellum and brain, and related phenotypes are Decreased viability and Synthetic lethal with Ras