The 49th Annual Congress of the International Society of Paediatric Oncology will be in Washington DC, USA. We are excited to be in the US and present an outstanding and interesting scientific programme which will facilitate the exchange of ideas and information in paediatric oncology. Each year, SIOP is highlighted by engaging sessions given by world renowned experts. Tailored to the entire SIOP community of clinicians, scientists, nurses, allied health professionals, parents and survivors, the world's leading paediatric oncology congress is your opportunity to engage with colleagues from across the globe striving towards a world free of childhood cancer.