| Primary Tumor (T) | |
| Regional Lymph Nodes (N) | |
| Distant Metastasis (M) | |
This view displays the TNM formula.Please select appropriate value from the list for T/N/M variables. The result will be displayed, based on your selection of variables.
Definition of Primary Tumor (T)
| T Category | T Criteria |
|---|---|
| TX | Tumor cannot be assessed |
| T1 | Tumor limited to the pancreas, less than 2 cm |
| T2 | Tumor limited to the pancreas, 2-4 cm |
| T3 | Tumor limited to the pancreas, greater than 4 cm; or tumor invading the duodenum or common bile duct |
| T4 | Tumor invading adjacent organs (stomach, spleen, colon, adrenal gland ) or the wall of large vessels (celiac axis or the superior mesenteric artery) |
Limited to the pancreas means there is no invasion of adjacent organs (stomach, spleen, colon, adrenal gland ) or the wall of large vessels (celiac axis or the superior mesenteric artery). Extension of tumor into peripancreatic adipose tissue is NOT a basis for staging.
Multiple tumors should be designated as such (the largest tumor should be used to assign T category): If the number of tumors is known, use T(#); e.g., pT3(4) N0 M0. If the number of tumors is unavailable or too numerous, use the m suffix, T(m); e.g., pT3(m) N0 M0.
Definition of Regional Lymph Node (N)
| N Category | N Criteria |
|---|---|
| NX | Regional lymph nodes cannot be assessed |
| N0 | No regional lymph node involvement |
| N1 | Regional lymph node involvement |
Definition of Distant Metastasis (M)
| M Category | M Criteria |
|---|---|
| M0 | No distant metastasis |
| M1 | Distant metastases |
| M1a | Metastasis confined to liver |
| M1b | Metastases in at least one extrahepatic site (e.g., lung, ovary, nonregional lymph node, peritoneum, bone) |
| M1c | Both hepatic and extrahepatic metastases |