A gastrointestinal stromal tumor of the third portion of the duodenum treated by wedge resection: A case report

Table 1 Risk of aggressive behavior in gastrointestinal stromal tumors

Risk	Size (cm)	Mitotic count(mitoses per 50 high powered fields)
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

Adapted from Fletcher et al[22].