Neurodevelopmental Disorder with Dysmorphic Facies, Impaired Speech, and Hypotonia, is also known as neddish. An important gene associated with Neurodevelopmental Disorder with Dysmorphic Facies, Impaired Speech, and Hypotonia is MADD (MAP Kinase Activating Death Domain). Affiliated tissues include testes and bone marrow, and related phenotypes are delayed speech and language development and motor delay