RT Book, Section A1 Bissonnette, Bruno A1 Luginbuehl, Igor A1 Engelhardt, Thomas SR Print(0) ID 1164080332 T1 Nonketotic Hyperglycinemia T2 Syndromes: Rapid Recognition and Perioperative Implications, 2e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259861789 LK accessanesthesiology.mhmedical.com/content.aspx?aid=1164080332 RD 2024/04/19 AB Isolated hyperglycinemia due to deficiency of the glycine cleavage enzyme system. Most patients present in the first week of life with lethargy, hypotonia, and myoclonic jerks, and often progress to apnea requiring ventilator support.