Welcome to our community of over 1,800 pediatric hematology/oncology professionals

The Société Internationale d’Oncologie Pédiatrique/International Society of Paediatric Oncology (SIOP) was formed on November 6, 1969, as a small group of specialists at the Institut Gustave-Roussy (IGR) in Villejuif, Paris, who’s mission it was to advance the study and care of children with cancer, a basic mission that continues to this day.

These aims have expanded to embrace the advancement of basic research as well as clinical studies, the inclusion of nurses, other health professionals and parents, and the organization of teaching and outreach programs to better the lot of children in underdeveloped nations and societies.

By today, SIOP has transformed itself  into a truly global, multifaceted organization and is the only global multidisciplinary society entirely devoted to paediatric and adolescent cancer. The society has over 1,800 members worldwide including doctors, nurses, other health-care professionals, scientists and researchers. Our members are dedicated to increasing knowledge about all aspects of childhood cancer.

Vision, Mission and Strategic Priorities


No child should die of cancer and that cure can be achieved with no or minimal late effects.


  • By advocating globally on behalf of patients and families to ensure that every child and adolescent with cancer has access to state of the art diagnosis, treatment and care
  • By providing training opportunities for all childhood and adolescent cancer care providers worldwide on the latest clinical and scientific advances through meetings, networking, and educational outreach for continuing professional development
  • By promoting and advancing basic, clinical, and other research, and by supporting collaborative opportunities and translating scientific discovery to improve the outcomes for children and adolescents with cancer
  • By supporting those caring for children and adolescents with cancer and to provide them with the best curative and palliative therapies
  • By advocating appropriate long-term follow-up for survivors

Objectives & Goals

  • To advocate globally for children with cancer and their families
  • To promote the participation of young professionals in SIOP activities and to encourage them to become members
  • To improve SIOP’s visibility and to improve internal and external communications
  • To focus attention on future research needs in paediatric oncology
  • To explore possible partnerships with sister societies sharing the same mission and vision, and elaborating a common agenda
  • To increase the SIOP membership to have a vibrant society which understands and fulfils the needs of its members

2018 Annual Report


SIOP’s Board of Directors consists of a president, president-elect, immediate past president, secretary, treasurer, scientific committee chair, local organising chair of the annual meeting, head of advocacy and the six continental presidents. Learn more about your board members and how to get involved in leadership activities.


SIOP committees and working groups are an excellent way to help shape the future of SIOP. By serving on a committee or working group, you can grow your professional network, expand your knowledge, and exercise your leadership skills. Learn more about each committee’s current activities and how to get involved.