Table 3. Modified NIH risk of recurrence (21).
| Risk | Tumor size (cm) | Mitotic count (HPF) | Tumor site |
|---|---|---|---|
| Very low risk | <2 | <5/50 | Any |
| Low risk | 2.1–5 | <5/50 | Any |
| Intermediate risk | <5 | 6–10/50 | Gastric |
| 5.1–10 | <5/50 | Gastric | |
| High risk | Any | Any | Perforated tumor |
| >5 | >5/50 | Any | |
| >10 | Any | Any | |
| Any | >10/50 | Any | |
| 2.1–5 | >5/50 | Non-gastric | |
| 5.1–10 | <5/50 | Non-gastric |
HPF, high power field.