Recently a new TNM classification for tumors of the lung was published, encompassing some relevant changes, for example how to deal with multiple lung tumors. This article comprehensively describes respective changes. Furthermore, background information on how the new TNM classification was built and what should be done in the future to further improve prognosis and outcome prediction is reviewed.
Keywords: Descriptor; Grading; Lung carcinoma; Lymph nodes; Modifications 2017; TNM classification.