Executive summary

This study retrospectively evaluated 136 postoperative radiotherapy (PORT) patients (61 PBT, 75 IMRT). Median OS was 76 and 46 months for PBT and IMRT with corresponding 1- and 5-year OS of 85.3%, 50.9% and 89.3%, 37.2% (P = .38). Total toxicity burden was reduced with PBT (P = .017). Rates of cardiac toxicity were 14.7% IMRT and 4.9% PBT (P = .09), rates of ≥ grade 2 pneumonitis were 17.0% IMRT and 4.9% PBT (P = .104). This study concluded that PBT improved cardiac and lung sparing and reduced toxicity compared with IMRT. 

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