What is the TNM staging of colon cancer?

Updated: Apr 15, 2020
  • Author: Tomislav Dragovich, MD, PhD; Chief Editor: N Joseph Espat, MD, MS, FACS  more...
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The TNM staging system has become the international standard for staging of colorectal cancer. It uses the following three descriptors:

  • T for primary tumor
  • N for lymph nodal involvement
  • M for metastasis

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