Agree that the benefit is not clear but if the patient did well with adjuvant chemotherapy and is otherwise well then it is probably reasonable to try. I would encourage you to be thoughtful with how you define your tumor bed and boost volume. The whole point of a boost is to reduce the risk of local failure in the area of highest concern. This person had a right hepatectomy. If the tumor didn't penetrate the capsule or involve adjacent tissues and they had wide margins then the physical location of the tumor preoperatively is not where they are at risk of failing. Consider intrahepatic paths of spread (like vessels) and boost the residual hepatic margins you think are most at risk. You may not be able to define one. I don't universally include a boost volume. You are treating this person because they had N2 disease. If it is the nodes you are worried about, don't go crazy on the primary. No matter how big you make your fields they are at risk of satellitosis and intrahepatic failure. Its just the nature of the disease.