Current role of capsule endoscopy in Crohn’s disease

Table 2 Lewis score for mucosal inflammatory changes

Lesions in the proximal, mid, and distal small bowel thirds

Villous appearance

0: Normal

1: Edema

8: Short segment

12: Long segment; 20: The whole third

1: Single; 14: Patchy

Ulcers

0: None; 3: One; 5: Few; 10: Multiple

5: Short segment; 10: Long segment; 15: The whole third

9: 1⁄4; 12: 1⁄4-1⁄2; 18: > 1⁄2

Strictures

0: None; 14: One

2: Non ulcerated; 24: Ulcerated

7: No retention; 10: Capsule retention

Score calculation: Stricture score is added to the sum total for highest scoring villous edema and segment ulcers