European research lays the foundation for the development of new and ambitious research projects with xenografts derived from patients, preclinical models with great potential to advance research and treatment in cancer. The review article, published in Nature Reviews Cancer , is the result of the joint work of the European consortium of researchers EurOPDX, which includes different researchers from the Bellvitge Biomedical Research Institute – Catalan Institute of Oncology , among which there are Eva Gonzalez-Suarez and Alberto Villanueva.