Table 1 5-point scale classification on MRI for detection of EMVI
mrEMVI score | MRI features |
|---|---|
0 | No vessels adjacent to areas of tumor penetration |
1 | Minimal extramural tumor stranding/nodular extension, but not adjacent vascular structure |
2 | Extramural stranding in the vicinity of extramural vessels, but that are normal in caliber; no exact tumor signal within vessels |
3 | Intermediate tumor signal intensity within a mesorectal vascular structure that have contour and caliber only slightly expanded |
4 | Obvious irregular vessel contour or nodular expansion of vessels by serpiginous extension of the definite tumor signal intensity in large anatomic vessels |