“…The phase 3 NRG Radiation Therapy Oncology Group (RTOG) 1005 clinical trial, with a median follow-up of 7.3 years, demonstrated that SIB-mhWBRT is as effective as conventional fractionation with a sequential boost from the point of view of in-breast relapse rates and late adverse effects, for breast cancer patients who do not require regional lymphatic node irradiation. 10 Despite the growing evidence of the safety and efficacy of hypofractionated SIB concept application for adjuvant breast RT, 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 this is still not in widespread clinical use. 1 , 22 In our department, SIB-mhWBRT has been used for the breast since July 2017.…”