Citrin deficiency causes CTLN2 (OMIM ID #603471) and NICCD (OMIM ID #605814) [1,14], while aralar deficiency is a rare disease causing global cerebral hypomyelination, developmental arrest, hypotonia, and epilepsy (OMIM ID #612949) [44,45]. The gene discussed is SLC25A13; the disease is neonatal intrahepatic cholestasis due to citrin deficiency.