Mondo Description Argininosuccinic aciduria (ASA) is a disorder of urea cycle metabolism most commonly characterized by either a severe, neonatal-onset form that manifests with hyperammonemia accompanied with vomiting, hypothermia, lethargy and poor feeding in the first few days of life, or late-onset forms (any age outside the newborn period) that manifest with stress or infection-induced episodic hyperammonemia or, in some, behavioral abnormalities and/or learning disabilities. Patients often manifest liver dysfunction.

Uniprot Description An autosomal recessive disorder of the urea cycle. The disease is characterized by mental and physical retardation, liver enlargement, skin lesions, dry and brittle hair showing trichorrhexis nodosa microscopically and fluorescing red, convulsions, and episodic unconsciousness.

Disease Ontology Description An amino acid metabolic disorder that involves the accumulation of argininosuccinic acid (ASA) in the blood and urine.