What are the TNM system node classifications in rectal cancer?

Updated: Apr 06, 2021
  • Author: Burt Cagir, MD, FACS; Chief Editor: N Joseph Espat, MD, MS, FACS  more...
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Regional lymph nodes (N) include the following:

  • NX - Regional lymph nodes cannot be assessed
  • N0 - No regional lymph node metastasis
  • N1 - Metastasis in 1-3 pericolic or perirectal lymph nodes
  • N2 - Metastasis in 4 or more pericolic or perirectal lymph nodes
  • N3 - Metastasis in any lymph node along the course of a named vascular trunk

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