In order to ascertain whether FOXC2 is necessary for the ability of cells that have undergone EMT to augment tumor growth and angiogenesis in vivo, we co-mixed HMLE-Snail-shControl or HMLE-Snail-shFOXC2 cells with RFP/luciferase-labeled MCF-7 cells. The gene discussed is FOXC2; the disease is neoplasm.