Do you routinely offer post-operative radiotherapy for resected retroperitoneal sarcomas?

I do not routinely offer post-operative RT for resected RP sarcomas. Our approach is to offer pre-op. If pre-op is not given, regardless of R0/1 resection, we do not offer post-op. In these case, we will follow with surveillance scans and if recurrence is noted consider pre-op followed by surgical r...