Primary tumor (T) | |||
T category | T criteria | ||
TX | Primary tumor cannot be assessed | ||
T0 | No evidence of primary tumor | ||
Tis | Carcinoma in situ. This includes high-grade pancreatic intraepithelial neoplasia (PanIn-3), intraductal papillary mucinous neoplasm with high-grade dysplasia, intraductal tubulopapillary neoplasm with high-grade dysplasia, and mucinous cystic neoplasm with high-grade dysplasia. | ||
T1 | Tumor ≤2 cm in greatest dimension | ||
T1a | Tumor ≤0.5 cm in greatest dimension | ||
T1b | Tumor >0.5 and <1 cm in greatest dimension | ||
T1c | Tumor 1 to 2 cm in greatest dimension | ||
T2 | Tumor >2 and ≤4 cm in greatest dimension | ||
T3 | Tumor >4 cm in greatest dimension | ||
T4 | Tumor involves the celiac axis, superior mesenteric artery, and/or common hepatic artery, regardless of size | ||
Regional lymph nodes (N) | |||
N category | N criteria | ||
NX | Regional lymph nodes cannot be assessed | ||
N0 | No regional lymph node metastasis | ||
N1 | Metastasis in one to three regional lymph nodes | ||
N2 | Metastasis in four or more regional lymph nodes | ||
Distant metastasis (M) | |||
M category | M criteria | ||
M0 | No distant metastasis | ||
M1 | Distant metastasis | ||
Prognostic stage groups | |||
When T is... | And N is... | And M is... | Then the stage group is... |
Tis | N0 | M0 | 0 |
T1 | N0 | M0 | IA |
T1 | N1 | M0 | IIB |
T1 | N2 | M0 | III |
T2 | N0 | M0 | IB |
T2 | N1 | M0 | IIB |
T2 | N2 | M0 | III |
T3 | N0 | M0 | IIA |
T3 | N1 | M0 | IIB |
T3 | N2 | M0 | III |
T4 | Any N | M0 | III |
Any T | Any N | M1 | IV |
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