Abstract: The TNM staging is the most common tumor staging system of lung cancer. The new revisioned 7th lung cancer TNM staging is published by the international association for the study of lung cancer (IASLC) in the 13th world conference on lung cancer. Accurate clinical staging depends on the multi-analysis from medical histroy, clinical examination, imaging examination and invasive test, which has important significance for guiding the treatment of lung cancer. The 7th lung cancer TNM classification has been revised respectively from the primary focus, lymph node metastasis and remote viscera metastasis, so as to make it more accurately corresponding to the prognosis of patients.

Key words: Carcinoma, non-small-cell lung, Neoplasm staging, Positron-emission tomography, Tomography, X-ray computed