Table 2.

Armed Forces Institute of Pathology risk classification

Mitotic count	Tumor size	Stomach	Duodenum	Jejunum and ileum	Rectum
≤ 5/50 HPF	≤ 2 cm	None	None	None	None
	2.1–5 cm	Very low	Low	Low	Low
	5.1–10 cm	Low	Moderate	Insufficient data	Insufficient data
	> 10 cm	Moderate	High	High	High
> 5/50 HPF	≤ 2 cm	None	High	None	High
	2.1–5 cm	Moderate	High	High	High
	5.1–10 cm	High	High	Insufficient data	Insufficient data
	> 10 cm	High	High	High	High

HPF high-power field