Table 6. Histologic Grading Systema
| GX | Grade cannot be assessed. |
| G1 | Well differentiated. |
| G2 | Moderately differentiated. |
| G3 | Poorly differentiated. |
| G4 | Undifferentiated. |
| G = grade | |
| 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. |
