Type II citrullinemia has two main clinical phenotypes: neonatal intrahepatic cholestatic hepatitis caused by citrin deficiency (NICCD; OMIM# 6,05,814) and adult-onset type II citrullinemia (CTLN2; OMIM# 6,03,471) (Saheki and Kobayashi, 2002). The gene discussed is SLC25A13; the disease is citrullinemia type II.