Table 5. Quantifying score of magnetic resonance enterographic features of Crohn’s disease activity 10.
| MRE feature | Grading scale | ||
|---|---|---|---|
| Bowel wall thickening | <3 mm: 0 pts | 3 – 7 mm: 1 pt | >7 mm: 2 pts |
| Contrast enhancement1 | None: 0 pts | Homogenous pattern: 1 pt | Layered pattern: 2 pts |
| Fat wrapping | None: 0 pts | Present: 1 pt | |
| Proliferation of mesenteric vasculature | None: 0 pts | <5 vessels/3 cm2 of mesenteric fat: 1 pt | ≥ 5 vessels/3 cm2 of mesenteric fat: 2 pts |
| Mesenteric lymphadenopathy | None: 0 pts | <10 enlarged (diameter > 5 mm) lymph nodes: 1 pt | ≥ 10 enlarged (diameter > 5 mm) lymph nodes: 2 pts |
| Bowel wall ulcerations | None: 0 pts | At least one ulceration present, not exceeding ½ of bowel thickness: 1 pt | At least one ulceration present, exceeding ½ of bowel thickness: 2 pts |
| Stenotic complications2 | None: 0 pts | Stenosis without prestenotic dilatation: 1 pt | At least one stenosis with prestenotic dilatation: 2 pts |
| Intra-abdominal fistulas | None: 0 pts | At least one intra-abdominal fistula tract visible: 2 pts | |
| Extent of the disease in jejunum or ileum | <1500 mm: 1 pt | >1500 mm: 2 pts | |
1assessed in comparison with the adjacent bowel loops.
2decrease in bowel caliber in comparison with the adjacent bowel loops, with dilatation of the proximal segment and/or a collapse of the distal segment.