Citrullinemia Type 1
National Organization for Rare Disorders, Inc.
It is possible that the main title of the report Citrullinemia Type 1 is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
- arginosuccinate synthetase deficiency
- arginosuccinic acid synthetase deficiency
- ASS deficiency
- citrullinemia, classic
Citrullinemia type I (CTLN1) is a rare autosomal recessive genetic disorder that includes a neonatal acute (classic) form, a milder late-onset form, a form that begins during or after pregnancy, and an asymptomatic form.
CTLN1 is caused by deficiency or absence of the enzyme argininosuccinate synthetase (ASS). ASS is one of six enzymes that play a role in the removal of nitrogen from the body, a process known as the urea cycle. The lack of this enzyme results in excessive accumulation of nitrogen, in the form of ammonia (hyperammonemia), in the blood and all body fluids.
Infants with the classic form may experience vomiting, refusal to eat, progressive lethargy, and show signs of increased intracranial pressure. Prompt treatment can prolong survival, but neurologic deficits are usually present. The course of the late-onset form is sometimes milder but episodes of hyperammonemia are similar to the classic form.
American Kidney Fund, Inc.
- 11921 Rockville Pike
- Suite 300
- Rockville, MD 20852
- Tel: (800)638-8299
- Email: firstname.lastname@example.org
- Website: http://www.kidneyfund.org
CLIMB (Children Living with Inherited Metabolic Diseases)
- Climb Building
- 176 Nantwich Road
- Crewe, CW2 6BG
- United Kingdom
- Tel: 4408452412173
- Fax: 4408452412174
- Email: email@example.com
- Website: http://www.CLIMB.org.uk
Genetic and Rare Diseases (GARD) Information Center
- PO Box 8126
- Gaithersburg, MD 20898-8126
- Tel: (301)251-4925
- Fax: (301)251-4911
- Tel: (888)205-2311
- Website: http://rarediseases.info.nih.gov/GARD/
National Kidney Foundation
- 30 East 33rd Street
- New York, NY 10016
- Tel: (212)889-2210
- Fax: (212)689-9261
- Tel: (800)622-9010
- Email: firstname.lastname@example.org
- Website: http://www.kidney.org
National Urea Cycle Disorders Foundation
- 75 South Grand Avenue
- Pasadena, CA 91105-1602
- Tel: (626)578-0833
- Fax: (626)578-0823
- Tel: (800)386-8233
- Email: email@example.com
- Website: http://www.nucdf.org
Save Babies Through Screening Foundation
- P.O. Box 42197
- Cincinnati, OH 45242
- Tel: (610)251-9876
- Fax: (610)647-5757
- Tel: (888)454-3383
- Email: firstname.lastname@example.org
- Website: http://www.savebabies.org
Urea Cycle Disorders Consortium
- Children's National Medical Center
- 111 Michigan Avenue, NW
- Washington, DC 20010
- Tel: (815)333-4014
- Email: email@example.com
- Website: http://rarediseasesnetwork.epi.usf.edu/ucdc/index.htm
For a Complete Report
This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".
The information provided in this report is not intended for diagnostic purposes. It is provided for informational purposes only. NORD recommends that affected individuals seek the advice or counsel of their own personal physicians.
It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report
This disease entry is based upon medical information available through the date at the end of the topic. Since NORD's resources are limited, it is not possible to keep every entry in the Rare Disease Database completely current and accurate. Please check with the agencies listed in the Resources section for the most current information about this disorder.
For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. Box 1968, Danbury, CT 06813-1968; phone (203) 744-0100; web site www.rarediseases.org or email firstname.lastname@example.org
Last Updated: 1/12/1970
Copyright 2013 National Organization for Rare Disorders, Inc.
Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.