N1 N2 N3 staging

• related: Chest lymph nodes and where to find them
• tags: #permanent

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• N1 is ipsilateral hilar lymph nodes
• N2 is involvement of ipsilateral mediastinal lymph nodes
• N3 is contralateral mediastinal or hilar nodes

Examples

• Left lung nodule
  • 10L or 11L positive: N1
  • 4L positive: N2
  • 7 positive: N2
  • 4R positive: N3
  • 10R or 11R positive: N3

Links to this note

• Chest lymph nodes and where to find them
  • N1 N2 N3 staging
• azygos vein and pulmonary artery distinguish hilar and mediastinal lymph nodes
  • distinguish station 4 and 10 is important because this can affect staging (N1 N2 N3 staging)