Catalog

Pterin-4-carbinolamine dehydratase deficiency

No MMS code

Link to WHO Definition

Pterin-4-carbinolamine dehydratase deficiency – http://id.who.int/icd/entity/956925984

Dehydratase deficiency is one of the etiologies of hyperphenylalaninemia due to tetrahydrobioptein deficiency. However pterin-4 alpha-carbinolamine dehydratase (PCD) deficiency is a mild pathological abnormality, except for the risk of induced hyperphenylalaninemia. In some cases, the following signs have been noted: hypotonia, EEG showing irritative signs, and slow acquisition of psychomotor skills. It is diagnosed when the 7-biopterin isomer (primapterin) is - usually fortuitously - found in the biological fluids of an infant with hyperphenylalaninemia. Management is mainly based on dietary and restricted phenylalanine intake