Table 1.

Criteria used for risk classification

	Original reports (“old” guidelines)	Re-evaluation (“updated” guidelines)
Low risk	cT1-2	cT1-2-3ab
	cN0	cN0
	Tumor-MRF distance > 1 mm	Tumor-MRF distance > 1 mm
High risk	cT3-4	cT3cd-4
	cN1-2	cN1-2
	Tumor-MRF distance ≤ 1 mm	Tumor-MRF distance ≤ 1 mm
	-	EMVI +

cT3a =  < 1 mm invasion beyond rectal wall

cT3b = 1–5 mm invasion beyond rectal wall

cT3c = 5–15 mm invasion beyond rectal wall

cT3d =  > 15 mm invasion beyond rectal wall