Primary tumor (T) |
T category | T criteria |
TX | Primary tumor cannot be assessed |
T0 | No evidence of primary tumor |
Tis | Carcinoma in situ (intraductal tumor) |
T1 | Solitary tumor without vascular invasion, ≤5 cm or >5 cm |
T1a | Solitary tumor ≤5 cm without vascular invasion |
T1b | Solitary tumor >5 cm without vascular invasion |
T2 | Solitary tumor with intrahepatic vascular invasion or multiple tumors, with or without vascular invasion |
T3 | Tumor perforating the visceral peritoneum |
T4 | Tumor involving local extrahepatic structures by direct invasion |
Regional lymph nodes (N) |
N category | N criteria |
NX | Regional lymph nodes cannot be assessed |
N0 | No regional lymph node metastasis |
N1 | Regional lymph node metastasis present |
Distant metastasis (M) |
M category | M criteria |
M0 | No distant metastasis |
M1 | Distant metastasis present |
Prognostic stage groups |
When T is... | And N is... | And M is... | Then the stage group is... |
Tis | N0 | M0 | 0 |
T1a | N0 | M0 | IA |
T1b | N0 | M0 | IB |
T2 | N0 | M0 | II |
T3 | N0 | M0 | IIIA |
T4 | N0 | M0 | IIIB |
Any T | N1 | M0 | IIIB |
Any T | Any N | M1 | IV |