Intellectual Developmental Disorder, Autosomal Dominant 51, also known as mrd51, is related to contractures, pterygia, and spondylocarpotarsal fusion syndrome 1a and congenital hemidysplasia with ichthyosiform erythroderma and limb defects. An important gene associated with Intellectual Developmental Disorder, Autosomal Dominant 51 is KMT5B (Lysine Methyltransferase 5B). Related phenotypes are intellectual disability and autistic behavior