Table 2.

MRI criteria for “good prognosis” and “poor prognosis” rectal tumors.

MRI criteria	Good prognosis	Poor prognosis
Predicted CRM	>1 mm (nonthreatened)	≤ 1 mm (threatened)
T-categorya and EMDb	Definite T2, T2/early T3, or definite T3 with EMDb< 5 mm	Definite T3 with EMDb > 5 mm or T4
Nc-category	Any N0, N1, or N2	Any N0, N1, or N2
EMVId	Absent or equivocal	Present

^a Includes, primary tumor, discontinuous tumor nodes, suspicious lymph nodes, and extramural venous invasion; definite T1 and T1/early T2 tumors will be excluded from study protocol

^b EMD = extramural depth of invasion

^c N=regional lymph nodes

^d EMVI = extramural venous invasion