The International Association for the Study of Lung Cancer Staging Project for Lung Cancer: Proposals for the Revision of the N Descriptors in the Forthcoming Ninth Edition of the TNM Classification for Lung Cancer

Introduction:The accurate assessment of nodal (N) status is crucial to the management and prognostication of non-metastatic non-small cell lung cancer.We sought to determine whether the current N descriptors should be maintained or revised for the upcoming 9 th edition of the international Tumor Node Metastasis (TNM) lung cancer staging system.