The International Workshops on Genotoxicity Testing (IWGT), founded in the early 1990s, have become a significant workshop format to advance regulatory genotoxicity testing. The working model and structure is to assemble scientific experts, representing academia, health authorities and industry across the major geographic regions, to address topics of strong current interest in the genetic toxicology community. The outcome of the discussions are data-driven consensus recommendations on these subjects, which are published ant thus made available to the scientific community. As a consequence, regularly those scientific recommendations have served as the basis for regulatory guidance language.

IWGT has held seven previous workshops (Melbourne, 1993; Washington, 1999; Plymouth, 2002; San Francisco, 2005; Basel, 2009; Foz do Iguacu, Brazil, 2013; Tokyo, Japan, 2017) and the consensus recommendations from these have been highly influential in shaping the revisions to OECD guidelines and the recommendations in the ICH S2 guidance.