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There have been controversies regarding the prognostic relevance of the number of positive N2 nodes in pathologic stage IIIA-N2 non–small-cell lung cancer (NSCLC). We examine prognosis of patients with pathologic stage IIIA-N2 with classifying the number of positive N2 nodes into subgroups.From January 1997 to December 2004, 250 patients were diagnosed with pathologic stage IIIA-N2 disease. All patients...
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