Macrocephaly/autism Syndrome, also known as macrocephaly-autism syndrome, is related to hemimegalencephaly and megalencephaly. An important gene associated with Macrocephaly/autism Syndrome is PTEN (Phosphatase And Tensin Homolog), and among its related pathways/superpathways are Signal Transduction and Metabolism. Affiliated tissues include b cells and thyroid, and related phenotypes are macrocephaly and autistic behavior