Intellectual Developmental Disorder, Autosomal Dominant 4, also known as mrd4, is related to aland island eye disease and borjeson-forssman-lehmann syndrome. An important gene associated with Intellectual Developmental Disorder, Autosomal Dominant 4 is MRD4 (Mental Retardation, Autosomal Dominant 4). Affiliated tissues include brain, and related phenotypes are intellectual disability and intellectual disability, severe