Disease or Syndrome
hyperargininemia
Subclass of:
Urea Cycle Disorders, Inborn
Definitions related to hyperargininemia:
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(argininemia) A rare autosomal recessive metabolic disorder characterized by a deficiency of the enzyme arginase resulting in accumulation of arginine and urea in the blood and cerebrospinal fluid. Signs and symptoms include developmental delays, spasticity, ataxia, seizures and mental retardation.NCI ThesaurusU.S. National Cancer Institute, 2021
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(argininemia) Rare autosomal recessive disorder of the urea cycle; caused by a deficiency of the hepatic enzyme type I arginase; arginine is elevated in the blood and cerebrospinal fluid, and periodic hyperammonemia may occur; disease onset is usually in infancy or early childhood; clinical manifestations include seizures, microcephaly, progressive mental impairment, hypotonia, ataxia, spastic diplegia, and quadriparesis.CRISP ThesaurusNational Institutes of Health, 2006
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A rare autosomal recessive disorder of the urea cycle. It is caused by a deficiency of the hepatic enzyme ARGINASE. Arginine is elevated in the blood and cerebrospinal fluid, and periodic HYPERAMMONEMIA may occur. Disease onset is usually in infancy or early childhood. Clinical manifestations include seizures, microcephaly, progressive mental impairment, hypotonia, ataxia, spastic diplegia, and quadriparesis. (From Hum Genet 1993 Mar;91(1):1-5; Menkes, Textbook of Child Neurology, 5th ed, p51)NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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Arginase deficiency in untreated individuals is characterized by episodic hyperammonemia of variable degree that is infrequently severe enough to be life threatening or to cause death. Most commonly, birth and early childhood are normal. Untreated individuals have slowing of linear growth at age one to three years, followed by development of spasticity, plateauing of cognitive development, and subsequent loss of developmental milestones. If untreated, arginase deficiency usually progresses to severe spasticity, loss of ambulation, complete loss of bowel and bladder control, and severe intellectual disability. Seizures are common and are usually controlled easily. Individuals treated from birth, either as a result of newborn screening or having an affected older sib, appear to have minimal symptoms.GeneReviewsUniversity of Washington, 2021
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Arginase deficiency is thought to be the least common of the urea cycle disorders. This entity also manifests itself in a fashion somewhat different from other disorders in the group (see Physical).WebMD, 2019
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Arginase deficiency is an inherited metabolic disease in which the body is unable to process arginine (a building block of protein). It belongs to a group of disorders known as urea cycle disorders. These occur when the body's process for removing ammonia is disrupted, which can cause ammonia levels in the blood to rise (hyperammonemia)....National Center for Advancing Translational Sciences
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