The conversion tables, and the background to the classification and its 2017 update are part of the chapter of forthcoming International Incidence of Childhood Cancer, volume 3. They should be cited as follows:
Steliarova-Foucher E, Colombet M, Ries LAG, Rous B, Stiller CA. Classification of tumours. In: Steliarova-Foucher E, Colombet M, Ries LAG, Moreno F, Dolya A, Shin HY, Hesseling P, Stiller CA, editors. International Incidence of Childhood Cancer, Volume 3. Lyon: International Agency for Research on Cancer, in press.