ICD-11 definition : Citrullinemia type 1 is a rare autosomal recessive urea cycle defect characterized
clinically by hyperammonemia, progressive lethargy, poor feeding and vomiting in the
neonatal form (Acute neonatal citrullinemia type 1, ) and by variable hyperammonemia
in the later-onset form (Adult-onset citrullinemia type 1, ).;
ICD-11 synonym : Citrullinuria type 1; Citrullinuria type 3; Argininosuccinate synthase deficiency; Classic citrullinaemia; Citrullinaemia type 3; CTLN1 - [Citrullinaemia type 1];
Citrullinemia type 1 is a rare autosomal recessive urea cycle defect characterized
clinically by hyperammonemia, progressive lethargy, poor feeding and vomiting in the
neonatal form (Acute neonatal citrullinemia type 1, ) and by variable hyperammonemia
in the later-onset form (Adult-onset citrullinemia type 1, ).