Alternative titles and symbols : Mental retardation, autosomal dominant 5;
Description : MRD5 is characterized by moderate to severe intellectual disability with delayed psychomotor
development apparent in the first years of life. Some patients develop variable types
of seizures, some have autism or autism spectrum disorder (see 209850), and some have
acquired microcephaly (summary by Berryer et al., 2013).;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the synaptic Ras GTPase activating protein 1 gene (SYNGAP1,
603384.0001);