Primary tumor (T) | |
T category | T criteria |
TX | Primary tumor cannot be assessed |
T1 | Organ confined |
T2 | Tumor extension into tissue beyond organ |
T2a | Invades serosa or visceral peritoneum |
T2b | Extension beyond serosa (mesentery) |
T3 | Invades another organ |
T4 | Multifocal involvement |
T4a | Multifocal (two sites) |
T4b | Multifocal (three to five sites) |
T4c | Multifocal (>5 sites) |
Regional lymph nodes (N) | |
N category | N criteria |
N0 | No lymph node involvement or unknown lymph node status |
N1 | Lymph node involvement present |
Distant metastasis (M) | |
M category | M criteria |
M0 | No metastases |
M1 | Metastases present |
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