| 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 |
| 5 | Regional, NOS |
| 7 | Distant site(s)/node(s) involved |
| 9 | Unknown/unstaged/unspecified/DCO |
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