Small bowel video capsule endoscopy in Crohn’s disease: What have we learned in the last ten years?

Table 1 Lewis capsule endoscopy scoring table[38]

	Regions1
	Duodenum	Jejunum	Proximal ileum	Distal ileum
	Lesions
	Number	Distribution pattern	Longitudinal extent	Shape	Size (by circumference)
Erythema		Localized = 1	Short segment = 1
		Patchy = 2	Long segment = 2
		Diffuse = 3	Whole region = 3
Edema		Localized = 1	Short segment = 1
		Patchy = 2	Long segment = 2
		Diffuse = 3	Whole region = 3
Nodularity	Single = 1	Localized = 1	Short segment = 1
	Few = 2	Patchy = 2	Long segment = 2
	Multiple = 3	Diffuse = 3	Whole region = 3
Ulcer	Single = 3	Localized = 3	Short segment = 1	Circular = 3	< ¼ = 3
	Few = 5	Patchy = 5	Long segment = 2	Linear = 5	¼ - ½ = 5
	Multiple = 7	Diffuse = 7	Whole region = 3	Irregular = 7	> ½ = 7
Stenosis	None = 0	Traversed = 10	Nonulcerated = 5
	Single = 10	Not traversed = 20	Ulcerated = 10
	Multiple = 20

¹Score by region by adding points listed.

Table 2 Parameters and weightings for the capsule endoscopy scoring index[39]

	Parameters	Number	Longitudinal extent	Descriptors
First tertile	Villous appearance	Normal = 0	Short segment = 8	Single = 1
		Edematous = 1	Long segment = 12	Patchy = 14
			Whole segment = 20	Diffuse = 17
	Ulcer	None = 0	Short segment = 8	< ¼ = 9
		Single = 3	Long segment = 12	¼ to ½ =12
		Few = 5	Whole segment = 20	> ½ = 18
		Multiple = 10
Second tertile	Villous appearance	Normal = 0	Short segment = 8	Single = 1
		Edematous = 1	Long segment = 12	Patchy = 14
			Whole segment = 20	Diffuse = 17
	Ulcer	None = 0	Short segment = 8	< ¼ = 9
		Single = 3	Long segment = 12	¼ to ½ = 12
		Few = 5	Whole segment = 20	> ½ = 18
		Multiple = 10
	Villous appearance	Normal = 0	Short segment = 8	Single = 1
		Edematous = 1	Long segment = 12	Patchy = 14
			Whole segment = 20	Diffuse = 17
	Ulcer	None = 0	Short segment = 8	< ¼ = 9
		Single = 3	Long segment = 12	¼ to ½ =12
		Few = 5	Whole segment = 20	> ½ = 18
		Multiple = 10
Third tertile	Villous appearance	Normal = 0	Short segment = 8	Single = 1
		Edematous = 1	Long segment = 12	Patchy = 14
			Whole segment = 20	Diffuse = 17
	Ulcer	None = 0	Short segment = 8	< ¼ = 9
		Single = 3	Long segment = 12	¼ to ½ =12
		Few = 5	Whole segment = 20	> ½ = 18
		Multiple = 10
Stenosis-rated for whole study	Stenosis	None = 0	Ulcerated = 24	Traversed = 7
		Single = 14	Non-ulcerated = 2	Not traversed = 10
		Multiple = 20

Table 3 Capsule endoscopy Crohn’s disease activity index scoring system[37]

	Proximal	Distal
A. Inflammation score	0 = None
	1 = Mild to moderate edema/hyperemia/denudation
	2 = Severe edema/hyperemia/denudation
	3 = Bleeding, exudates, aphthae, erosion small ulcer (< 0.5 cm)
	4 = Moderate ulcer (0.5 cm - 2 cm), pseudopolyp
	5 = Large ulcer (> 2 cm)
B. Extent of disease score	0 = None
	1 = Focal disease (single segment)
	2 = Patchy disease (multiple segments)
	3 = Diffuse disease
C. Narrowing (stricture)	0 = None
	1 = Single-passed
	2 = Multiple-passed
	3 = Obstruction
Segmental score = A × B + C
Total score = (A1 × B1 + C1) + (A2 × B2 + C2)