U.S. flag

An official website of the United States government

GTR Home > Conditions/Phenotypes > Pterin-4 alpha-carbinolamine dehydratase 1 deficiency

Pterin-4 alpha-carbinolamine dehydratase 1 deficiency

Synonyms
CADH DEFICIENCY; HYPERPHENYLALANINEMIA WITH PRIMAPTERINURIA; HYPERPHENYLALANINEMIA, TETRAHYDROBIOPTERIN-DEFICIENT, DUE TO PTERIN-4-ALPHA-CARBINOLAMINE DEHYDRATASE DEFICIENCY; Hyperphenylalaninemia due to dehydratase deficiency
Modes of inheritance
Autosomal recessive inheritance (Orphanet)

Summary

Tetrahydrobiopterin (BH4)-deficient hyperphenylalaninemia (HPA) D is an autosomal recessive disorder characterized by mild transient hyperphenylalaninemia often detected by newborn screening. Patients also show increased excretion of 7-biopterin. Affected individuals are asymptomatic and show normal psychomotor development, although transient neurologic deficits in infancy have been reported (Thony et al., 1998). Patients may also develop hypomagnesemia and nonautoimmune diabetes mellitus during puberty (summary by Ferre et al., 2014). For a general phenotypic description and a discussion of genetic heterogeneity of BH4-deficient hyperphenylalaninemia, see HPABH4A (261640). [from OMIM]

Available tests

27 tests are in the database for this condition.

Check Related conditions for additional relevant tests.

Clinical tests (27 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: DCOH, PCBD, PCD, PHS, PCBD1
    Summary: pterin-4 alpha-carbinolamine dehydratase 1

Clinical features

Help
Imported from Human Phenotype Ontology (HPO)

Show allHide all

Reviews

Clinical resources

Practice guidelines

  • ACMG ACT, 2022
    American College of Medical Genetics and Genomics, Newborn Screening ACT Sheet, Elevated Phenylalanine, Phenylalanine hydroxylase deficiency (PAH), 2022
  • ACMG Algorithm, 2022
    American College of Medical Genetics and Genomics, Algorithm, PAH deficiency: Elevated Phenylalanine, 2022

Molecular resources

Consumer resources

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.