Congenital Disorder of Glycosylation, Type Iaa, is also known as congenital disorder of glycosylation, type 1aa. An important gene associated with Congenital Disorder of Glycosylation, Type Iaa is NUS1 (NUS1 Dehydrodolichyl Diphosphate Synthase Subunit). Related phenotypes are scoliosis and hearing impairment