paediatrics Brussels 17

SIOP UMBRELLA – RT Target Volume Definition

• GTV: based on the combination of pre-operative imaging, (clips?) and the reports by the surgeon and pathologist. Includes the contact zone of the pre-surgery tumour • CTV: Expanded GTV with an anatomically confined margin of 5-10 mm (without expansion into the intestines) including the para-aortic lymph node chain in case of lymph node involvement