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I'm not sold on adjuvant RT. With ultra-sensitive PSA testing and good follow-up, as long as they get sent to me before PSA reaches 1.0, I don't mind just watching patients with +margins or pT3a. T3b are going to fail distantly, but heck, lump them in there, too. As the data shows, 30-70% won't fail and won't need RT. I think a balance of watching PSA and early salvage is a cost-effective, low morbidity approach, and I think the consensus guidelines reflected that approach, as an alternative. The control arms treated with salvage RT way too late when the PSA would be 6 or something crazy and there is no way to salvage those folks.
Been giving most of them 6 months of ADT, too.
I use the data from the german study looking at a wait-and-see approach vs adjuvant RT in terms of a bPFS benefit. I don't believe the updates have shown a metastasis-free survival benefit as of yet, but if I can prevent people from going on to Lupron (which the SWOG study also demonstrated) and give them a bPFS benefit, I like to offer it to my T3 patients especially when I can counsel them on the 0.3% risk of G3-4 toxicity.
I think the risk factor of a +margin alone is a more nuanced conversation.
I know the RTOG is currently studying it, but I am also one of those people that likes to give 4-6 mos of ADT during XRT for bad disease (T3, G8, etc.... I'll go 1-2 years for +nodes).