Enfants Cancer Santé (CECS) brings together specialists from 31 French centers of oncology and pediatric hematology and their teams, about 350 members. This is the only experienced society for pediatric oncology in the country, and almost all research projects and clinical trials have been examined before starting and approved by the Scientific Advisory Board. The role of CECS is primarily coordinating research projects, support for protocols, and implementation of sustainable and structural projects.