Table 2. Primary Tumor (T)a
| TX | Primary tumor cannot be assessed. |
| T0 | No evidence of primary tumor. |
| Tis | Carcinoma in situ.b |
| T1 | Tumor limited to the pancreas, ≤2 cm in greatest dimension. |
| T2 | Tumor limited to the pancreas, >2 cm in greatest dimension. |
| T3 | Tumor extends beyond the pancreas but without involvement of the celiac axis or the superior mesenteric artery. |
| T4 | Tumor involves the celiac axis or the superior mesenteric artery (unresectable primary tumor). |
| aReprinted with permission from AJCC: Exocrine and endocrine pancreas. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 241-9. |
| bThis also includes the "PanInIII" classification. |
