Table 2. CT characteristics of the HyS as depicted on CT in ILs and MLs.
| CT features | HyS in MLs (n=68) | HyS in ILs (n=125) | P value |
|---|---|---|---|
| Number | <0.0001 | ||
| 1 | 24 (35.29) | 80 (64.00) | |
| >1 | 44 (64.71) | 45 (36.00) | |
| Shape | <0.0001 | ||
| Round/oval | 21 (30.88) | 95 (76.00) | |
| Irregular | 47 (69.12) | 30 (24.00) | |
| Boundary | <0.0001 | ||
| Well-defined | 11 (16.17) | 89 (71.20) | |
| Partially ill-defined | 31 (45.59) | 25 (20.00) | |
| Ill-defined | 26 (38.24) | 11 (8.80) | |
| CT value on plain CT scan (HU) | 17.25±10.23 | 16.36±12.08 | 0.607 |
| CT value on enhanced CT scan (HU) | 29.90±13.64 | 23.18±12.87 | 0.001 |
| ΔCT (HU) | 12.64±9.13 | 6.82±6.69 | <0.0001 |
Data are expressed as n (%) or mean ± standard deviation. ΔCT = peak CT value measured on enhanced images − CT value measured on plain CT scan. CT, computed tomography; ML, malignant lesion; IL, inflammatory lesion; HyS, hypodense sign; HU, Hounsfield units.