Table 2. MR imaging descriptors in NME lesions.
| Descriptor | Malignant (n=56) (%) | Benign (n=62) (%) | P value |
|---|---|---|---|
| Distribution | |||
| Focal | 10 (17.9) | 15 (24.2) | 0.400 |
| Linear | 1 (1.8) | 12 (19.4) | 0.002* |
| Segmental | 24 (42.9) | 13 (21.0) | 0.010* |
| Reginal | 6 (10.7) | 10 (16.1) | 0.391 |
| Multiple regional | 5 (8.9) | 4 (6.5) | 0.874 |
| Diffuse | 10 (17.9) | 8 (12.9) | 0.455 |
| Internal enhancement patterns | |||
| Heterogeneous | 15 (21.8) | 32 (51.6) | 0.006* |
| Clustered-ring | 19 (33.9) | 3 (4.8) | <0.001* |
| Clumped | 22 (39.3) | 26 (41.9) | 0.770 |
| Homogeneous | 0 (0.0) | 1 (1.6) | 1.000 |
| Kinetic curve | |||
| Persistent | 2 (3.6) | 18 (29.0) | <0.001* |
| Plateau | 26 (46.4) | 26 (41.9) | 0.623 |
| Washout | 28 (50.0) | 18 (29.0) | 0.020* |
| ADC value | 0.001* | ||
| >1.3×10−3 mm2/s | 9 (16.1) | 28 (45.2) | |
| ≤1.3×10−3 mm2/s | 47 (83.9) | 34 (54.8) | |
| Diffusion restriction | 0.248 | ||
| Present | 48 (85.7) | 48 (77.4) | |
| Absent | 8 (14.3) | 14 (22.6) |
*, P<0.05. NME, non-mass enhancement; MRI, magnetic resonance imaging; ADC, apparent diffusion coefficient.