Intellectual Developmental Disorder, X-Linked 19, also known as xlid19, is related to chromosome xp11.22 duplication syndrome and coffin-lowry syndrome. An important gene associated with Intellectual Developmental Disorder, X-Linked 19 is RPS6KA3 (Ribosomal Protein S6 Kinase A3). Affiliated tissues include brain, and related phenotypes are intellectual disability, mild and intellectual disability