For Cases Diagnosed 1/1/2018 and Forward

Beginning with cancer cases diagnosed January 1, 2018 and forward, SEER registries in the United States will be collecting Extent of Disease (EOD) information. The three main data items will be EOD Primary Tumor, EOD Regional Nodes and EOD Mets. Using these three data items, a EOD TNM T, EOD TNM N and EOD TNM M will be derived, along with an EOD TNM Stage Group based on the AJCC 8th edition. SEER has developed a staging database referred to as the SEER*RSA that provides information about each cancer (primary site/histology/other factors defined).

This page provides resources including the General Coding Instructions for EOD and the Summary Stage 2018 Staging Manual.

Available Resources

For Cases Diagnosed 1/1/2016 - 12/31/2017

Beginning with cancer cases diagnosed January 1, 2016, cancer registries in the United States transitioned from collecting cancer stage information using Collaborative Stage (CS) to collecting stage using the TNM classification. TNM categories, stage groups, and definitions used by SEER are based on the TNM Classification of Malignant Tumours, 7th Edition. SEER developed a staging database referred to as the SEER*RSA that provides information about each cancer (primary site/histology/other factors defined).

This page provides resources including Section V of the 2016 SEER Program Manual, comparison and mapping between staging systems, and more information about UICC TNM staging.

Available Resources

SEER*RSA TNM Schema Mapping to UICC 7th edition, AJCC 7th edition, and Summary Stage 2000
These spreadsheets map the 153 Schemas in SEER*RSA to the other staging systems. Details on site and histologies included for each schema and staging type are detailed in the SEER*RSA TNM schema page for each schema.

Comparison of UICC 7th Edition and AJCC 7th Edition (PDF (PDF, 287 KB) ) (Excel (XLSX, 25 KB) )

The Union for International Cancer Control (UICC) websiteExternal Web Site Policy provides information about the organization and their global efforts to accelerate the fight against cancer. The UICC is an informative resource for learning about TNM including:

  • Information about TNMExternal Web Site Policy (what it is, why and how it should be used, and more).
  • TNM E-Learning ModulesExternal Web Site Policy.
  • Additional resources, including links to publicationsExternal Web Site Policy, such as TNM Classification of Malignant Tumours, 7th Edition, as well as the history of TNM.
  • The TNM HelpdeskExternal Web Site Policy to ask questions and access the FAQ page.