Code Structure of Summary Staging
In the process of staging, a corresponding numerical number
is assigned to each group defined by the Summary Staging System.
The table directly below shows the code structure of summary
staging. Note that "regional" stage comprises four distinct
stages, dependent upon disease spread.
| Code |
Definition |
| 0 |
In situ |
| 1 |
Localized only |
| 2 |
Regional by direct extension only |
| 3 |
Regional lymph nodes involved only |
| 4 |
Regional by BOTH direct extension AND lymph node
involvement |
| 5 |
Regional, NOS (Not Otherwise Specified) |
| 7 |
Distant site(s)/node(s) involved |
| 9 |
Unknown if extension or metastasis (unstaged,
unknown, or unspecified) Death certificate only
case |
|
|
