Inborn errors of metabolism constitute an important cause of neurological disease in the neonatal period and can present clinically as encephalopathy. Although it is relatively rare, it is important to have a high index of suspicion. Appropriate investigations and a step-wise approach to diagnosis allow for early institution of treatment and can prevent significant morbidity and mortality. The aim of this article is to give a brief outline of the various inborn errors of metabolism to consider in neonatal encephalopathy and to provide a framework for investigation and diagnosis.
Brain Diseases, Metabolic ; etiology ; Humans ; Infant, Newborn ; Metabolism, Inborn Errors ; complications ; diagnosis

Adolescent ; Adult ; Child ; Child, Preschool ; Female ; Hemoglobin E ; analysis ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Severity of Illness Index ; Singapore ; Young Adult ; beta-Thalassemia ; blood ; therapy