paediatrics Brussels 17

Second malignancies :Adulte and child

• Probably the dose response is linear with no downturn in risk when the dose increase even after 60 gy except for thyroid with down turn after 20gy ; (Berrington ) • After high dose exposure (> 5gy ) Excess of risk is 10 times lower than risk after low dose exposure (2 gy)) for Breast :role of fractionation and perhaps dose to the ovary done for infradiaphragmatique Rt in HD before 2000