DISORDER LIST
First Step will screen for the following Inborn Errors of Metabolism (also known as Metabolic Disorders) by Tandem Mass Spectrometry and Biochemical Analysis. Newborns are screened from a dried blood spot, ideally collected within 24 to 72 hours of birth.
Disorders Detected by Tandem Mass Spectrometry
Acylcarnitine Profile – Fatty Acid Oxidation Disorders
- Carnitine / Acylcarnitine Translocase Deficiency (CACT)
- 3-Hydroxy Long Chain Acyl-CoA Dehydrogenase Deficiency (LCHAD)
- Medium Chain Acyl-CoA Dehydrogenase Deficiency (MCAD)
- Neonatal Carnitine Palmitoyl Transferase Deficiency Type II (CPT-II)
- Very Long Chain Acyl-CoA Dehydrogenase Deficiency (VLCAD)
- Short chain Hydroxy Acyl-CoA Dehydrogenase Deficiency (SCHAD)
- Carnitine Palmitoyl Transferase Deficiency Type I * (CPT-I)
- 2,4-Dienoyl-CoA Reductase Deficiency * (DE-RED)
- Multiple Acyl-CoA Dehydrogenase Deficiency (GA-II)
- Short-chain Acyl-CoA Dehydrogenase Deficiency (SCAD)
- Trifunctional Protein Deficiency (TFP)
Acylcarnitine Profile – Organic Acid Disorders
- 3-Hydroxy-3-Methylglutaryl-CoA Lyase Deficiency (HMG)
- Glutaric Acidemia Type I (GA-I)
- Isobutyryl-CoA Dehydrogenase Deficiency (IBG)
- Isovaleric Acidemia (IVA)
- 2-Methylbutyryl-CoA Dehydrogenase Deficiency (2MBG)
- 3-Methylcrotonyl-CoA Carboxylase Deficiency (3MCC)
- Malonic Aciduria (MAL)
- Methylmalonic Acidemias (MMA)
- Mitochondrial Acetoacetyl-CoA Thiolase Deficiency (BKT)
- Propionic Acidemia (PROP)
- Multiple CoA Carboxylase Deficiency (MCD)
Amino Acid Profile – Amino Acid Disorders
- Argininemia (ARG)
- Argininosuccinic Aciduria (ASA)
- 5-Oxoprolinuria * (5-OXO)
- Carbamoylphosphate Synthetase Deficiency * (CPS)
- Citrullinemia (CIT-I)
- Homocystinuria (HCY)
- Hypermethioninemia * (MET)
- Hyperammonemia, Hyperornithinemia, Homocitrullinuria Syndrome * (HHH)
- Hyperornithinemia with Gyral Atrophy (HOGA)
- Maple Syrup Urine Disease (MSUD)
- Phenylketonuria (PKU)
- Tyrosinemia (TYR)
- Transient Neonatal Tyrosinemia
- Tyrosinemia Type I * (TYR I)
- Tyrosinemia Type II (TYR II)
- Tyrosinemia Type III (TYR III)
Lysosomal Storage Disorders (LSD)
Other Disorders
- Hyperalimentation
- Medium Chain Triglyceride Oil Administration (MCT)
- Treatment with Benzoate, Pyvalic Acid, or Valproic Acid
- Liver Disease
- Presence of EDTA coagulants in blood specimen
- Carnitine Uptake Deficiency (CUD)
*There is a lower probability of detection of this disorder during the immediate newborn period.
Disorders Detected by Other Technologies