Fig. 3From: A hypothesized TNM staging system based on the number and location of positive lymph nodes may better reflect the prognosis for patients with NSCLCa: 5-year OS rate of different substages combined nN stage in current TNM staging system. b: 5-year OS rate of different substages combined nN stage according to tendency toward deterioration in hypothesized TNM staging system. c: Subclassifications of the hypothesized TNM staging system and the comparison between 1-, 2-, 5-year OS rate of stage IA-IIIBBack to article page