Do New pN Subclassifications Proposed by IASLC's Lung Cancer Staging Project Agree with ypN Categories after Trimodality Therapy for Initial N2 Disease?

The current study was specifically intended to investigate whether ypN categories after trimodality therapy agree with International Association for the Study of Lung Cancer's new pN subclassification. Through the current study, the authors have confirmed that ypN downstaging to ypN0-1 from initial N2 stage is a favorable factor with respect to OS and raised the need for refinement of ypN subcategorization after trimodality therapy.