| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired | Column # |
|---|---|---|---|---|---|---|---|
| 764 | 1 | SEER | 2018 | 16 | 987 - 987 |
| 0 | In situ |
| 1 | Localized only |
| 2 | Regional by direct extension only |
| 3 | Regional lymph nodes only |
| 4 | Regional by BOTH direct extension AND regional lymph node involvement |
| 7 | Distant site(s)/node(s) involved |
| 8 | Benign/borderline* |
| 9 | Unknown if extension or metastasis (unstaged, unknown, or unspecified) Death certificate only case |