Prof. Javier S Castresana, MD, PhD from the University of the Basque Country, is a Full Professor of Genetics at the University of Navarra School of Sciences, in Pamplona, Spain. He was a predoctoral research fellow at the Karolinska Institute, Stockholm, Sweden, for three years (1988–1990), and a postdoctoral scientist at the Massachusetts General Hospital and Harvard Medical School, Boston, USA, for two years (1990–1992). He joined the Spanish Research Council (CSIC), in Madrid, for five years (1992–1997) as a senior scientist, and finally moved to the University of Navarra as an Assistant Professor (1997–2004), Associate Professor (2004–2010), and Full Professor of Genetics (since 2010). His work is focused on the study of the molecular genetics and cell biology of lethal tumors like glioblastoma, medulloblastoma, and neuroblastoma.