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Copyright 1988, 1989, 1996, 2003, 2007, 2009
NORD is very grateful to Harvey L. Levy, MD, Senior Physician in Medicine, Children's Hospital Boston, Professor of Pediatrics, Harvard Medical School, for assistance in the preparation of this report.
Synonyms of Histidinemia
- HAL Deficiency
- HIS Deficiency
- Histidase Deficiency
- Histidine Ammonia-Lyase (HAL) Deficiency
- Hyperhistidinemia
Disorder Subdivisions
General Discussion
Histidinemia is a rare hereditary metabolic disorder characterized by a deficiency of the enzyme histidase, which is necessary for the metabolism of the amino acid histidine. The concentration of histidine is elevated in the blood. Excessive amounts of histidine, imidazole pyruvic acid, and other imidazole metabolism products are excreted in the urine. The majority of individuals with histidinemia have no obvious symptoms that would indicate that a person has this disorder (asymptomatic). Histidinemia is inherited as an autosomal recessive trait.
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Organizations related to Histidinemia
- CLIMB (Children Living with Inherited Metabolic Diseases)
Climb Building
176 Nantwich Road
Crewe Intl CW2 6BG
Phone #: +44- 87-0 7700 325
800 #: --
e-mail: info.svcs@climb.org.uk
Home page: http://www.CLIMB.org.uk
- Genetic and Rare Diseases (GARD) Information Center
PO Box 8126
Gaithersburg MD 20898-8126
Phone #: 301-251-4925
800 #: 888-205-2311
e-mail: ordr@od.nih.gov
Home page: http://rarediseases.info.nih.gov/Default.aspx
- NIH/National Institute of Diabetes, Digestive & Kidney Diseases
Endocrine Diseases Metabolic Diseases Branch
2 Information Way
Bethesda MD 20892-3570
Phone #: 301-654-3810
800 #: --
e-mail: NDDIC@info.niddk.nih.gov
Home page: http://www.niddk.nih.gov
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