Intellectual Developmental Disorder, X-Linked 73, also known as mental retardation, x-linked 73, is related to non-syndromic x-linked intellectual disability 73 and coffin-lowry syndrome. An important gene associated with Intellectual Developmental Disorder, X-Linked 73 is MRX73 (Mental Retardation, X-Linked 73). Affiliated tissues include brain, and related phenotypes are intellectual disability, mild and synophrys