Megalencephaly-Polymicrogyria-Postaxial Polydactyly-Hydrocephalus Syndrome, also known as mpph syndrome, is related to megalencephaly and polymicrogyria. An important gene associated with Megalencephaly-Polymicrogyria-Postaxial Polydactyly-Hydrocephalus Syndrome is AKT3 (AKT Serine/Threonine Kinase 3), and among its related pathways/superpathways are GPCR Pathway and Prolactin Signaling. Affiliated tissues include brain and kidney, and related phenotypes are macrocephaly and megalencephaly