Intellectual Developmental Disorder, X-Linked, Syndromic, Hackmann-Di Donato Type, is also known as intellectual developmental disorder, x-linked, syndromic, hackman-di donato type. An important gene associated with Intellectual Developmental Disorder, X-Linked, Syndromic, Hackmann-Di Donato Type is NKAP (NFKB Activating Protein). Related phenotypes are hypotonia and global developmental delay