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Prognostic classification of gastrointestinal stromal tumors (GISTs) by Fletcher et al. [17]
| Risk of malignancy | Size of tumor (cm) | Mitotic counts (/50HPF) |
|---|---|---|
| Very low |
< 2 |
< 5 |
| Low |
2 to 5 |
< 5 |
| Intermediate |
< 5 |
6 to 10 |
| |
5 to 10 |
< 5 |
| High |
> 5 |
> 5 |
| |
> 10 |
Any counts |
| Any size | > 10 |
