Mitochondrial Complex I Deficiency, Nuclear Type 18, is also known as mc1dn18. An important gene associated with Mitochondrial Complex I Deficiency, Nuclear Type 18 is NDUFAF3 (NADH:Ubiquinone Oxidoreductase Complex Assembly Factor 3). Affiliated tissues include liver and eye, and related phenotypes are decreased activity of mitochondrial complex i and optic disc pallor