The TNM Staging System is a system for CANCER STAGING.

The TNM Staging System:

• is one of the most widely used systems for CANCER STAGING and
• has been accepted by the Union for International Cancer Control (UICC) and the American Joint Committee on Cancer (AJCC).

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.

This supporting information is also known by these names:

Context	Alias
formerly	Cancer TNM Staging
plural	TNM Staging Systems
fullname	Tumour, Node, Metastasis Staging System