Regarding Dandy-Walker syndrome, all are seen except-

Dandy-walker malformation The Dandy-Walker malformation consists of a cystic expansion of the 4th ventricle in the posterior fossa and midline cerebellar hypoplasia. There is : - Hydrocephalus (90% of cases) Agenesis of the cerebellar vermis and corpus callosum. The rapid increase in head size with prominent occiput.