TNM Staging System


The TNM Staging System  is a system for CANCER STAGING.

The TNM Staging System:

The TNM Staging System is based on:

  • the extent of the Tumour (T)

  • the extent of spread to the lymph nodes (N) and

  • the presence of distant metastasis (M).

A number is added to each letter to indicate the size or extent of the primary Tumour and the extent of cancer spread.

For further information on the TNM Staging System, see the  National Cancer Institute website.

Also Known As

This NHS business definition is also known by these names:

Context Alias
Formerly Cancer TNM Staging
Full name Tumour, Node, Metastasis Staging System
Plural TNM Staging Systems