Table 4.
2017 World Health Organization (WHO) classification and grading of pancreatic neuroendocrine neoplasms
| Grade | Ki-67 proliferation index (%) | Mitotic index |
|---|---|---|
| Well-differentiated | ||
| G1 | <3 | <2 |
| G2 | 3–20 | 2–20 |
| G3 | >20 | >20 |
| Poorly differentiated (G3) | >20 | >20 |
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