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A: the novel TNM (nTNM) classification was defined as the distance from the origin on a Cartesian plane that incorporated two variables: the pN stage (x-axis) and pT stage (y-axis); B: the Pythagoras theorem was used to calculate the distance of any given point from the origin of the plane (0, 0), where [(nTNM)2 = (pN)2 + (pT)2]; C: AJCC 8th TNM classification; D: nTNM classification; E: the staging migration between the nTNM and AJCC 8th TNM staging systems in the training cohort.
