Craniosynostosis, Dandy-Walker malformation and hydrocephalus is a malformation disorder characterized by sagittal craniosynostosis (see this term), Dandy-Walker malformation, hydrocephalus, craniofacial dysmorphism (including dolichocephaly, hypertelorism, micrognathia, positional ear deformity) and variable developmental delay. The inheritance pattern appears to be autosomal dominant.