55th Congress of the International Society of Paediatric Oncology

Ottawa, Canada, October 11-14, 2023


The 55th Congress of the International Society of Paediatric Oncology will take place in Ottawa, Canada, October 11-14, 2023.

The SIOP 2023 Congress is the place to hear the latest Paediatric Oncology updates from across the world, meet new people and share experiences, and showcase your work.

We are heading to the continental home of the Children’s Oncology Group and expect to be flooded with the latest breakthroughs from their comprehensive clinical trials portfolio. The Congress will be home to many international comparative debates and discussions from which we can all take home new ideas and inspiration.

SIOP 2023 is organised in conjunction with The International Society of Paediatric Surgical Oncology (IPSO), the Paediatric Radiation Oncology Society (PROS), and Childhood Cancer International (CCI).


March 22, 2023 – Abstract Submission Deadline https://cpaper.ctimeetingtech.com/siop23/login

March 22, 2023 – SIOP 2024 Programme Proposal Deadline

July 18, 2023 – Early Registration Savings Deadline


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