Previously, only a few genes had been associated with the formation of metastases in colorectal cancer. Now, researchers of the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch and Charité - University Medicine Berlin, Germany, have identified 115 genes that are disregulated both in the primary tumor and in its metastases. In the future, their findings may help identify patients with aggressive tumors at an earlier stage (Gastroenterology 2009, doi:10.1053/j.gastro.2009.03.041).