How do you approach at-risk draining nodes and the bronchial stump in PORT volumes for margin-positive, pN0 NSCLC?

For a positive-margin, pN0 NSCLC, I would only treat the positive margin region. In a pN0 patient, there would be no benefit to treating the mediastinum prophylactically and there is certainly no evidence for this. One could perhaps make an argument for prophylactically treating regional LNs if the ...