What is the staging for lymph node (N) involvement in non–small cell lung cancer (NSCLC)?

Updated: Jul 15, 2021
  • Author: Winston W Tan, MD, FACP; Chief Editor: Nagla Abdel Karim, MD, PhD  more...
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Lymph node (N) involvement is as follows:

  • NX - Regional nodes cannot be assessed

  • N0 - No regional node metastasis

  • N1 - Metastasis in ipsilateral peribronchial and/or ipsilateral hilar nodes and intrapulmonary nodes, including involvement by direct extension

  • N2 - Metastasis in ipsilateral mediastinal and/or subcarinal node

  • N3 - Metastasis in contralateral mediastinal, contralateral hilar, ipsilateral or contralateral scalene node, or supraclavicular node

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