Table 2.
Risk of malignancy in GIST lesions.
| Risk of malignancy | Size | Mitotic count |
|---|---|---|
| Very low | <2 cm | <5/50 HPF |
| Low | 2–5 cm | <5/50 HPF |
| Moderate | >5 cm | 6–10/50 HPF |
| >5 cm | <5/50 HPF | |
| High | >5 cm | 6–10/50 HPF |
| Any size | >10/50 HPF |
HPF, high power field.
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