title: Tandem mass neonatal screening in Taiwan--report from one center.
abstract: OBJECTIVE
  Neonatal screening using tandem mass spectrometry (MS/MS) started in Taiwan in 2000. We evaluated the efficacy of this system by analyzing the frequency of diseases and the outcome of the patients identified.
  
  
  METHODS
  Between August 2001 and July 2004, 199, 922 neonates were screened for 10 amino acids and acylcarnitines using MS/MS in a single center.
  
  
  RESULTS
  In total, 29 cases of inborn errors of metabolism were detected. The overall prevalence was one per 6894 births. The most common inborn error found was 3-methylcrotonyl CoA carboxylase deficiency (10 cases, 34.5%), but none of the cases needed aggressive treatment. There were two cases of type I glutaric aciduria, two cases of maple syrup urine disease, and one case of type II citrullinemia, and early therapeutic intervention was effective for all of them.
  
  
  CONCLUSIONS
  We found that MS/MS neonatal screening was valuable in the early diagnosis of severe and treatable inborn errors of metabolism such as organic acidemias and urea cycle disorders. It also detected less severe disorders that required only observation.
authors.affiliation: Departments of Pediatrics, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Hsiang-Po
authors.initials: HP
authors.lastname: Huang
authors.forename: Kai-Lin
authors.initials: KL
authors.lastname: Chu
authors.forename: Yin-Hsiu
authors.initials: YH
authors.lastname: Chien
authors.forename: Ming-Lee
authors.initials: ML
authors.lastname: Wei
authors.forename: Shu-Tzu
authors.initials: ST
authors.lastname: Wu
authors.forename: Shiao-Fang
authors.initials: SF
authors.lastname: Wang
authors.forename: Wuh-Liang
authors.initials: WL
authors.lastname: Hwu
mesh_terms: D000596:Amino Acids / Q000097:blood; D002331:Carnitine / Q000031:analogs & derivatives / Q000097:blood; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D013058:Mass Spectrometry; D008661:Metabolism, Inborn Errors / Q000175:diagnosis*; D015997:Neonatal Screening; D013624:Taiwan
chemical_list: D000596:Amino Acids; C116917:acylcarnitine; D002331:Carnitine