Table 1.

Fletcher criteria for risk stratification of gastrointestinal stromal tumors

Risk	Tumor size (cm)	Mitotic count (/50 HPF)
Very low-risk	> 2	< 5
Low-risk	2-5	< 5
Intermediate risk	< 5	6-10
	5 - 10	< 5
High-risk	> 5	> 5
	> 10	any mitotic rate
	any size	> 10

HPF: High-power field.