Megalencephaly-Polymicrogyria-Polydactyly-Hydrocephalus Syndrome 3, is also known as mpph3. An important gene associated with Megalencephaly-Polymicrogyria-Polydactyly-Hydrocephalus Syndrome 3 is CCND2 (Cyclin D2). Affiliated tissues include liver and brain, and related phenotypes are megalencephaly and global developmental delay