Long-Term Survival of Patients With pN2 Lung Cancer According to the Pattern of Lymphatic Spread

Among pN2 patients, the combination of N1 involvement (pN0N2 vs pN1N2) and number of involved N2 stations (1S vs 2S) are independent prognostic factors. These results might be taken into consideration to sub-classify the heterogeneous pN2-NSCLC group of patients.