Table 2.
Stage grouping
| Stage 0 | Tis | N0 | M0 |
| Stage I | T1 | N0 | M0 |
| Stage IIA | T2 | N0 | M0 |
| T3 | N0 | M0 | |
| Stage IIB | T1 | N1 | M0 |
| T2 | N1 | M0 | |
| Stage III | T3 | N1 | M0 |
| T4 | Any N | M0 | |
| Stage IV | Any T | Any N | M1 |
| Stage IVa | Any T | Any N | M1a |
| Stage IVb | Any T | Any N | M1b |
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