CT Findings in Acute, Subacute, and Chronic Ischemic Colitis: Suggestions for Diagnosis

Table 1

CT findings of IC according to the different phases of disease and etiology.

	Acute phase (32)			Subacute phase (22)			Chronic phase (10)
	Occlusive (12)	Nonocclusive (20)		Occlusive (4)	Nonocclusive (18)		Occlusive (1)	Nonocclusive (9)
a	12/12 (100%)	20/20 (100%)	—	4/4 (100%)	4/18 (22.2%)	0.01	0/1	0/9	—
b	8/12 (66.7%)	10/20 (50%)	—	3/4 (75%)	0/18	0.003	0/1	0/9	—
c	5/12 (41.7%)	9/20 (45%)	—	1/4 (25%)	2/18 (11.1%)	—	0/1	0/9	—
d	9/12 (75%)	0/20	<0.001	1/4 (25%)	18/18 (100%)	0.003	0/1	0/9	—
e	9/12 (75%)	0/20	<0.001	1/4 (25%)	18/18 (100%)	3	1/1 (100%)	9/9 (100%)	—
f	9/12 (75%)	0/20	<0.001	1/4 (25%)	18/18 (100%)	0.003	0/1	0/9	—
g	3/12 (25%)	1/20 (5%)	—	3/4 (75%)	0/18	3	0/1	0/9	—
h	1/12 (8.3%)	20/20 (100%)	<0.001	3/4 (75%)	0/18	0.003	1/1 (100%)	6/9 (66.7%)	—
i	0/12	17/20 (85%)	<0.001	0/4	8/18 (44.5%)	—	0/1	4/9 (44.4%)	—
j	0/12	1/20 (5%)	—	0/4	0/18	—	0/1	0/9	—

The differences between occlusive and nonocclusive forms in each phase were analyzed and compared by means of Fisher’s exact test. Values of (bold) were considered statistically significant.
(pt) patients; (a) pericolic fluid; (b) peritoneal free fluid; (c) bowel wall hyperdensity at unenhanced CT; (d) hyperdensity with target configuration (two or three concentric rings) of colonic wall after i.v. contrast medium administration; (e) presence of bowel wall thickening (more than 3 mm in thickness); (f) shape of bowel thickness (uniform); (g) bowel wall hypodensity after i.v. contrast medium administration; (h) dilation of colonic lumen only gas-filled (diameter more than 5 cm); (i) parenchymal ischemia/infarction (liver and/kidney/spleen); (j) wall pneumatosis.