CCLG Children's Cancer and Leukaemia Group COG Children's Oncology Group CPR central pathology review CRF case report form CRR central radiology review IMPORT Improving Population Outcomes for Renal Tumours of Childhood MDT multidisciplinary team SIOP International Society of Paediatric Oncology TR tumour rupture WART whole abdominal radiotherapy WT Wilms tumour 1 INTRODUCTION According to the International Society of Paediatric Oncology (SIOP) staging criteria for renal tumours of...