Rare birth defects include:22q11. 2 deletion syndrome (DiGeorge Syndrome and Velocardiofacial syndrome)Albinism, ocular.Albinism, oculocutaneous.Anencephaly (a neural tube defect)Arnold-Chiari malformation (chiari malformation)CHARGE syndrome.Congenital adrenal hyperplasia.Congenital diaphragmatic hernia (CDH)More items…