A Rare Case of Neonatal Hypotonia: Neonatal Nonketotic Hyperglycinemia

Authors: AYHAN TAŞTEKİN, RAHMİ ÖRS, BEHZAT ÖZKAN, ORHAN DENİZ

Abstract: Hypotonia is a serious physical finding in a newborn infant. Nonketotic hyperglycinemia (NKH) is a rare cause of neonatal hypotonia. It is a defect of the glycine metabolism and has poor prognosis. We report a case of a newborn infant with NKH, presented with mild hypotonia and high creatine kinase values. NKH should be considered in a hypotonic newborn, especially if associated with acute deterioration, lethargy and seizures.

Keywords: Nonketotic hyperglycinemia, hypotonia.

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