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Presence and absence of metastases in regional lymph nodes and distant metastases.
| N | Regional lymph nodes |
| Nx | Regional lymph nodes cannot be evaluated |
| No | Without metastases in regional lymph nodes |
| N1 | Metastases in regional lymph nodes |
| Mx | The presence of distant metastases cannot be estimated |
| M0 | Without distant metastasis |
| M1 | Distant metastases |
