Table 2.
Comparison of CT features of malignant and benign GGOs
| CT features | Malignant GGOs (n = 144) |
Benign GGOs (n = 103) |
P Value |
|---|---|---|---|
| Diameter (mm) | 20.3 ± 7.6 | 21.1 ± 11.6 | 0.428 |
| Location | |||
| Upper lobe | 115 (79.9) | 53 (51.5) | < 0.001 |
| Middle lobe | 6 (4.2) | 4 (3.9) | |
| Lower lobe | 23 (16.0) | 46 (44.7) | |
| Density pattern | |||
| pGGO | 22 (15.3) | 53 (51.5) | < 0.001 |
| mGGO with centric solid component | 89 (61.8) | 27 (26.2) | |
| mGGO with scattered solid component | 33 (22.9) | 23 (22.3) | |
| Boundary | |||
| Well-defined | 96 (66.7) | 29 (28.2) | < 0.001 |
| Ill-defined | 48 (33.3) | 74 (71.8) | |
| Internal dilated bronchus | |||
| Yes | 89 (61.8) | 13 (12.6) | < 0.001 |
| No | 55 (38.2) | 90 (87.4) | |
| Distribution in relation to bronchovascular bundles | |||
| Type I | 122 (84.7) | 18 (17.5) | < 0.001 |
| Type II | 2 (1.4) | 25 (24.3) | |
| Type III | 8 (5.6) | 25 (24.3) | |
| Type IV | 12 (8.3) | 35 (34.0) | |
Data are expressed as number (percentage) or mean ± standard deviation
CT computed tomography, GGOs ground-glass opacities, pGGO pure ground-glass opacity, mGGO mixed ground-glass opacity