Table 1 Proposed approach for defining risk of aggressive behavior in GIST, by Fletcher [2]
From: Surgical resection for gastrointestinal stromal tumors (GIST): experience on 25 patients
Tumor Size (cm) | Mitotic count | |
|---|---|---|
Very low risk | < 2 cm | < 5/50 HPF |
Low risk | 2–5 cm | < 5/50 HPF |
Intermediate risk | < 5 cm | 6–10/50 HPF |
5–10 cm | < 5/50 HPF | |
High risk | > 5 cm | > 5/50 HPF |
> 10 cm | any mitotic rate | |
any size | > 10/50 HPF |