Small intestine contrast ultrasonography vs computed tomography enteroclysis for assessing ileal Crohn's disease

Table 1 Clinical characteristics of the 16 patients considered in the analysis

Disease	Sex	Age(yr)	Surgical indication	Lesions extent (cm)	CD pattern
CD	M	39	Sub-obstructions	30	Fibrostricturing
CD	F	19	Abscess	20	Fistulizing
CD	F	49	Sub-obstructions	30	Fibrostricturing
CD	M	38	Abscess	21	Fibrostricturing
CD	F	73	Sub-obstructions	40	Fibrostricturing
CD	F	33	Sub-obstructions	25	Fibrostricturing
CD	F	57	Sub-obstructions	30	Fibrostricturing
CD	M	31	Abscess	15	Fistulizing
CD	F	49	Sub-obstructions	35	Fibrostricturing
CD	M	41	Sub-obstructions	20	Fibrostricturing
CD	M	45	Sub-obstructions	15	Fibrostricturing
CD	M	30	Sub-obstructions	40	Fibrostricturing
CD	M	30	Sub-obstructions	35	Fibrostricturing
Small bowel duplication	M	60	Sub-obstructions	20	NA
Ischemic enteritis	M	69	Abdominal pain	10	NA
Small bowel carcinoid	F	77	Diarrhoea, weight loss	35	NA

CD: Crohn’s disease; M: Male; F: Female; NA: Not applicable (non-CD).

Table 2 Characteristics of the lesions in the 13 Crohn’s disease patients, as assessed by surgical pathology (considered as a gold standard), small intestine contrast ultrasonography, computed tomography-enterography and histology

Characteristics	Surgery	SICUS	CTE	Histology
CD site
Ileum	8/13	10/131	10/13	8/13
Ileum-colon	5/13	3/13	3/13	5/13
CD extent (cm)
< 10	0/13	12/13	12/13	9/13
≥ 10	13/13	1/13	1/13	4/13
Strictures
Yes	13/13	12/13	13/13	13/13
No	0/13	1/13	0/13	0/13
Dilation
Yes	10/13	10/13	11/13	5/13
No	0/13	0/13	2/13	8/13
Fistulae
Yes	5/13	6/13	4/13	6/13
No	8/13	7/13	9/13	7/13
Abscesses
Yes	3/13	5/13	3/13	4/13
No	11/13	8/13	10/13	9/13

¹Including the jejunum in 1 patient. CD: Crohn’s disease; SICUS: Small intestine contrast ultrasonography; CTE: Computed tomography-enterography.

Table 3 Sensitivity, specificity and accuracy of small intestine contrast ultrasonography and computed tomography-enterography for detecting the presence of small bowel abscesses, strictures, fistulae and bowel dilation in Crohn’s disease

Parameter	SICUS			CTE
	Sens.	Spec.	Accuracy	Sens.	Spec.	Accuracy
Strictures	92	0	92	100	0	100
	(TN 0; TP 12; FN 1; FP 0)			(TN 0; TP 13; FN 0; FP0)
Dilation	100	50	85	78	0	82
	(TN2; TP 9; FN 0; FP2)			(TN 0; TP 7; FN 2; FP 4)
Fistulae	60	88	77	60	88	77
	(TN 7; TP 3; FN 2; FP 1)			(TN 7; TP 3; FN 2; FP 1)
Abscesses	100	80	85	67	100	85
	(TN 8; TP 3; FN 0; FP 2)			(TN 9; TP 2; FN 1; FP 1)

SICUS: Small intestine contrast ultrasonography; CTE: Computed tomography-enterography; TN: True negative; TP: True positive; FN: False negative; FP: False positive; Sens.: Sensitivity; Spec.: Specificity.