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Kaplan-Meier curves for postoperative overall survival of 230 pathologic (p)N0 patients, 17 pN1 patients, 12 skip N2 patients, and 20 non-skip N2 patients. The prognosis of skip N2 patients was significantly better than that of non-skip N2 patients (P = 0.008). There was no significant difference between the prognosis of skip N2 and pN0 or pN1 patients (P = 0.801, P = 0.985, respectively). pN0: pathological N0; pN1: pathological N1.
