A very rare tricarboxylic acid cycle disorder resulting from a deficiency in alpha-ketoglutarate dehydrogenase (one of the three subunits of the alpha-ketoglutarate dehydrogenase complex), that most often presents in the neonatal period with hypotonia, severe encephalopathy, extrapyramidal signs, pyramidal tract dysfunction and seizures and that frequently results in death in early childhood. Metabolic acidosis, elevated lactate and glutamate levels and variable degrees of glutaric aciduria are noted. Sudden death, myocardiopathy, and hepatic disorders have also been reported in some cases.

A rare, genetic, inborn error of metabolism disorder characterised by neonatal-onset of developmental delay, hypotonia, hepatomegaly, lactic acidaemia, increased creatine kinase levels, elevated alpha-ketoglutaric acid in urine, and a decreased plasma beta-hydroxybutyrate-to-acetoacetate ratio. Pyruvate dehydrogenase deficiency can be associated, leading to hypoglycaemia and neurologic anomalies, including seizures.

A rare, genetic, inborn error of metabolism disorder characterized by neonatal-onset of developmental delay, hypotonia, hepatomegaly, lactic acidemia, increased creatine kinase levels, elevated alpha-ketoglutaric acid in urine, and a decreased plasma beta-hydroxybutyrate-to-acetoacetate ratio. Pyruvate dehydrogenase deficiency can be associated, leading to hypoglycemia and neurologic anomalies, including seizures.