<unk> , is a rare autosomal recessive metabolic disorder caused by a deficiency of the enzyme histidase. Histidase is needed for the metabolism of the amino acid histidine. Although originally thought to be linked to multiple developmental disorders<unk>  is now accepted as a relatively benign disorder, leading to a reduction in the prevalence of neonatal screening procedures.
Histidinemia
Isovaleric acidemia
Pipecolic acidemia
Galactosemia
Hyperphenylalaninemia
D-Glyceric acidemia
Hypoplasminogenemia
Hawkinsinuria