Favourable Outcome in Two Pregnancies in a Patient with 3-Hydroxy-3-Methylglutaryl-CoA Lyase Deficiency -- Lysosomal Acid Lipase Deficiency in 23 Spanish Patients: High Frequency of the Novel c.966+2T>G Mutation in Wolman Disease -- Guanidinoacetate Methyltransferase Activity in Lymphocytes, for a Fast Diagnosis -- Galactose Epimerase Deficiency: Expanding the Phenotype -- Development and Psychometric Evaluation of the MetabQoL 1.0: A Quality of Life Questionnaire for Paediatric Patients with Intoxication-Type Inborn Errors of Metabolism -- Widening the Heterogeneity of Leigh Syndrome: Clinical, Biochemical, and Neuroradiologic Features in a Patient Harboring a NDUFA10 Mutation -- Normal Neurological Development During Infancy Despite Massive Hyperammonemia in Early Treated NAGS Deficiency -- Dihydropyrimidine Dehydrogenase Deficiency: Metabolic Disease or Biochemical Phenotype? -- Potential Misdiagnosis of Hyperhomocysteinemia due to Cystathionine Beta-Synthase Deficiency During Pregnancy -- Clinical and Molecular Variability in Patients with PHKA2 Variants and Liver Phosphorylase b Kinase Deficiency -- Hyperphenylalaninemia Correlated with Global Decrease of Antioxidant Genes Expression in White Blood Cells of Adult Patients with Phenylketonuria -- The Impact of Fabry Disease on Reproductive Fitness -- Neonatal-Onset Hereditary Coproporphyria: A New Variant of Hereditary Coproporphyria -- Treatment Adherence and Psychological Wellbeing in Maternal Carers of Children with Phenylketonuria (PKU) -- Systematic Review and Meta-analysis of Intelligence Quotient in Early-Treated Individuals with Classical Galactosemia.