Data Element

Information from the submission form

AJCC M Category
For both Clinical (cM) and Pathological (pM) the M Category is defined as the absence or presence of distant metastases in sites and/or organs outside the local tumor area and regional nodes as defined for each cancer site. For some cancer sites, the location and volume or burden of distant metastases are included. Distant Metastasis (M) Categories: The distant metastasis category specifies whether distant metastasis is present. M0 No evidence of distant metastasis M1 Distant metastasis


Important update to AJCC USCDI ONDEC submission

The American Joint Committee on Cancer (AJCC) would like to provide an important update on the Cancer Staging (AJCC TNM), AJCC T Category, AJCC N Category, AJCC M Category, and AJCC Stage Group data elements originally submitted to USCDI ONDEC on October 23, 2020.   The AJCC requests that the USCDI reviewers reconsider the Classification Level of the AJCC data elements based on the recent development of a license agreement that will make the AJCC data elements accessible from the SNOMED CT terminology.  The AJCC feels that the availability of the AJCC data elements in a standard terminology that is freely available and in wide use significantly strengthens the original submission and demonstrates previous challenges have been addressed. The American College of Surgeons and SNOMED International entered into a license agreement to allow AJCC data elements to be included in the SNOMED CT terminology.  Provided below are links to the announcements from both organizations. The original and full comment from the AJCC is linked here:

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