Glycine encephalopathy (GE) is an inborn error of glycine metabolism characterized by accumulation of glycine in body fluids and tissues, including the brain, resulting in neurometabolic symptoms of variable severity. The disease is glycine encephalopathy (MONDO_0011612). Also known as: NKA, Nonketotic Hyperglycinemia, non-ketotic hyperglycinemia, nonketotic hyperglycinemia.