| TNM | |||
| T - primary tumor | |||
| For any T, add (m) for multiple tumors | |||
| TX | Primary tumor cannot be assessed | ||
| T0 | No evidence of primary tumor | ||
| T1 | Tumor limited to pancreas and size <2 cm | ||
| T2 | Tumor limited to the pancreas and size 2-4 cm | ||
| T3 | Tumor limited to the pancreas and size >4 cm or invading duodenum or bile duct | ||
| T4 | Tumor invading adjacent organs (stomach, spleen, colon, adrenal gland) or the wall of large vessels (celiac axis or superior mesenteric artery) | ||
| N - regional lymph nodes | |||
| NX | Regional lymph node cannot be assessed | ||
| N0 | No regional lymph node metastasis | ||
| N1 | Regional lymph node metastasis | ||
| M - distant metastases | |||
| MX | Distant metastasis cannot be assessed | ||
| M0 | No distant metastases | ||
| M1 | Distant metastasis | ||
| Stage | |||
| Disease stages | |||
| Stage I | T1 | N0 | M0 |
| Stage IIa | T2 | N0 | M0 |
| Stage IIb | T3 | N0 | M0 |
| Stage IIIa | T4 | N0 | M0 |
| Stage IIIb | Any T | N1 | M0 |
| Stage IV | Any T | Any N | M1 |
