Furthermore, knock-down of FOXC2 in combination with Etv2 has been shown to disrupt vascular development in the zebrafish (De Val et al., 2008) and mouse embryo compound mutants for FOXC1 and FOXC2 display arteriovenous malformations (Seo et al., 2006). The gene discussed is ETV2; the disease is arteriovenous hemangioma/malformation.