urea cycle disorder

(redirected from Urea cycle defect)

urea cycle disorder

Any disorder in which the body is unable to excrete waste nitrogen–ammonia–resulting in mental and behavioral dysfunction, coma, death
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

urea cycle disorder

,

UCD

Any of six inherited disorders in which an enzyme in the urea cycle is missing or nonfunctional, resulting in the accumulation of excess ammonia in the bloodstream. Lethargy, failure to thrive, nausea and vomiting, encephalopathy, and coma are common symptoms, esp. in newborns.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The circular showed the expanded newborn screening test will be able to detect endocrine, amino and fatty acid disorders organic acid, urea cycle defect, cystic fibrosis, hemoglobinopathies, biotinidase deficiency, and other disorders.
After the exclusion of acquired disorders as the explanation for the hyperammonemia (infections and toxic reasons), the suspicion of a urea cycle defect became stronger in the light of the anamnesis.
But Billy became the first boy in the world to survive a urea cycle defect after having a pioneering operation when he was a week old.
Results from the metabolic screen indicate argininosuccinic aciduria, a urea cycle defect. The incidence of urea cycle defect ranges from 1 in 25,000 to 1 in 35,000.
After completeing his residency, Mark worked with a 13-year-old child who he discovered had urea cycle defect (an inborn error in metabolism).
Tandem Mass Spectroscopy (screening test of metabolic disorder) for urea cycle defect, organic aciduria, fatty acid oxidation disorder, amino acid disorder was also normal.
Women who are carriers of the urea cycle defect are at risk for developing hyperammonaemia during the postpartum period.11
Billy, who is no waged seven months, was born with a metabolic condition kno wn as urea cycle defect. He underwent the pioneering treatment when he was just two days old.
Billy, now seven months old, was born with urea cycle defect. He had the pioneering treatment when he was two days old.
Hyperammonemia can result from excess production or impaired elimination of ammonia, which can be seen in acute or chronic hepatic failure, multiple myeloma, urea cycle defects, fatty acid oxidation defects, Reye's syndrome, or exposure to toxins or medications such as valproic acid of 5-fluorouracil [1].
The value of qualitative urine organic acid analysis in the differential diagnosis of urea cycle defects is limited.