Validation of a prognostic model including the number of harvested lymph-nodes in the setting of non-small cell lung cancer patients undergoing curative resection: a multicenter analysis

The prognostic role of the extension of lymphadenectomy in non-small-cell lung cancer is still a debated and intriguing issue. The aim of this study is to validate a prognostic score including the number of resected lymph-nodes previously reported using a large multicenter dataset.From 01/2002 to 12/2012, data on 4858 NSCLC patients undergoing curative-intent surgery in six institutions were retrospectively reviewed. To test the discriminative...