In English | En español
Questions About Cancer? 1-800-4-CANCER

Non-Small Cell Lung Cancer Treatment (PDQ®)

  • Updated: 02/21/2014

Table 1. Stage Grouping Comparisons: Sixth Edition Versus Seventh Edition Descriptors, T and M Categories, and Stage Groupingsa,b

Sixth Edition T/M Descriptor (cm) Seventh Edition T/M N0 N1 N2 N3 
T1 (≤2)T1aIAIIAIIIAIIIB
T1 (>2–3)T1bIAIIAIIIAIIIB
T2 (≤5)T2aIBIIA IIIAIIIB
T2 (>5–7)T2bIIA IIBIIIAIIIB
T2 (>7)T3IIB IIIA IIIAIIIB
T3 invasionT3IIBIIIAIIIAIIIB
T4 (same lobe nodules)T3IIB IIIA IIIA IIIB
T4 (extension)T4IIIA IIIA IIIBIIIB
M1 (ipsilateral lung)T4IIIA IIIA IIIB IIIB
T4 (pleural effusion)M1aIV IV IV IV
M1 (contralateral lung)M1aIVIVIVIV
M1 (distant)M1bIVIVIVIV

T = primary tumor; N0 = no regional lymph node metastasis; N1 = metastasis in ipsilateral peribronchial and/or ipsilateral hilar lymph nodes and intrapulmonary nodes, including involvement by direct extension; N2 = metastasis in ipsilateral mediastinal and/or subcarinal lymph node(s); N3 = metastasis in contralateral mediastinal, contralateral hilar, ipsilateral or contralateral scalene, or supraclavicular lymph node(s); M = distant metastasis.
aCells in bold indicate a change from the sixth edition for a particular TNM category.
bReprinted with permission from Goldstraw P, Crowley J, Chansky K, et al.: The IASLC Lung Cancer Staging Project: Proposals for the revision of the TNM stage groupings in the forthcoming (seventh) edition of the TNM classification of malignant tumours. J. Thorac Oncol 2:706-14, 2007.