Video capsule endoscopy in inflammatory bowel disease

Table 2 Scoring systems for the assessment of inflammatory burden in Crohn’s disease: Lewis score

Parameter	Weightings (Calculated for each tertile)
Villous appearance	Appearance	Longitudinal extent	Descriptors
	0 = Normal	8 = Short segment	1 = Single
	1 = Oedematous	12 = Long segment	14 = Patchy
		20 = Whole tertile	17 = Diffuse
Ulcer	Number	Longitudinal extent	Descriptors
	0 = None	5 = Short segment	9 = Less than 25% of circumference
	3 = Single	10 = Long segment	12 = 25% to 50% of circumference
	5 = Few	25 = Whole tertile	18 = Greater than 50% of circumference
	10 = Multiple
Parameter	Weightings (Rated for the whole study)
Stenosis	Number	Appearance	Passage of capsule past stricture
	0 = None	24 = Ulcerated	7 = Traversed
	14 = Single	2 = Non-ulcerated	10 = Not traversed
	20 = Multiple

Short segment: ≤ 10% of the tertile; Long segment: 11%-50% of a tertile; Whole tertile: ≥ 50% of the tertile; Few: Two to seven lesions; Multiple: Eight or more ulcers, two or more stenoses.