Lorenzo (Renzo) Tomatis (Sassoferrato, Italy, 2 January 1929 - Lyon, France, 21 September 2007) was an Italian physician and experimental oncologist who researched carcinogenesis and its primary prevention Tomatis served as the Director from 1982 until 1993 of the International Agency for Research on Cancer in Lyon - (IARC). During his tenure at IARC, Tomatis led the effort to create the IARC Monographs on the Evaluation of Carcinogenic Risk to Humans (the so-called “orange books”), a tool for the primary prevention of cancer.