| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 2,850 | 2 | AJCC | 2003 | 10 |
Identifies the distant site(s) of metastatic involvement at time of diagnosis.
The presence of metastatic disease at diagnosis is an independent prognostic indicator, and it is used by Collaborative Staging to derive TNM-M codes and SEER Summary Stage codes.