SLC25A13 and Hyperammonemia: Citrin deficiency typically only manifests hyperammonemia in adolescents and adults with citrullinemia type II (CTLN2) but may also occur in infants with neonatal intrahepatic cholestasis caused by citrin deficiency (NICCD) and in older children with failure to thrive and dyslipidemia caused by citrin deficiency (FTTDCD) [12].