Table 2.
MDCT findings in the bezoars, with and without small bowel obstruction.
| MDCT findings | SBO group (n = 32) | Non-SBO group (n = 29) | P value |
|---|---|---|---|
| Bezoar features | |||
| Major diameter (cm ± SD) | 3.24 ± 0.53 | 1.62 ± 0.72 | <0.0001 |
| Volume (cm3 ± SD) | 14.89 ± 6.41 | 2.52 ± 2.73 | <0.0001 |
| CT value (HU ± SD) | 55.47 ± 23.39 | 173.03 ± 68.04 | <0.0001 |
| Location [n (%)] | |||
| Proximal | 1 (3.1) | 5 (17.2) | 0.128 |
| Middle | 10 (31.3) | 11 (37.9) | 0.781 |
| Distal | 21 (65.6) | 13 (44.8) | 0.169 |
| Type [n (%)] | |||
| Calcareous bezoar | 7 (21.9) | 26 (89.7) | <0.0001 |
| Phytobezoar | 24 (75.0) | 3 (10.3) | <0.0001 |
| Trichobezoar | 1 (3.1) | 0 | 1 |
| Secondary changes | |||
| Bowel changes | |||
| Dilatation (cm ± SD) | 3.26 ± 0.53 | 2.04 ± 0.26 | <0.0001 |
| Obstructive degree [n (%)] | |||
| No | 0 | 29 (100) | <0.0001 |
| Mild | 13 (40.6) | 0 | |
| Moderate | 15 (46.9) | 0 | |
| Severe | 4 (12.5) | 0 | |
| Wall thickening (mm ± SD) | 3.56 ± 0.83 | 1.89 ± 0.40 | <0.0001 |
| Wall enhancement (HU ± SD) | |||
| Unenhanced phase | 35.69 ± 5.85 | 34.03 ± 6.40 | 0.296 |
| Arterial phase∗ | 43.19 ± 15.06 | 28.93 ± 13.33 | 0.0001 |
| Portal phase∗ | 65.06 ± 17.41 | 46.14 ± 11.50 | <0.0001 |
| Target sign [n (%)] | 13 (40.6) | 0 | 0.0001 |
| Mesenteric changes [n (%)] | |||
| Vascular engorgement | 17 (53.1) | 0 | <0.0001 |
| Mesenteric haziness | 11 (34.4) | 0 | 0.002 |
| Ascites | 6 (18.8) | 3 (10.3) | 0.355 |
∗The absolute difference in the attenuation value of the bowel wall between the unenhanced and contrast-enhanced images.