Table 1. Patient Characteristics and MRI Findings of the Histopathologically Confirmed 111 Lesions.
| Characteristics | Benign Lesions (n = 77) | Malignant Lesions (n = 34) | ||
|---|---|---|---|---|
| Mean age (range) (years) | 49.2 (28–75) | 53.3 (41–75) | ||
| Median lesion size on MRI (range) (cm) | 1.0 (0.3–6.9) | 1.2 (0.5–6.6) | ||
| MRI finding | AB-MRI | FD-MRI | AB-MRI | FD-MRI |
| Mass | 56 (72.7) | 55 (71.4) | 26 (76.5) | 24 (70.6) |
| Shape | ||||
| Oval | 24 (42.9) | 23 (41.8) | 4 (15.4) | 5 (20.8) |
| Round | 1 (1.8) | 6 (10.9) | 1 (3.8) | 0 (0) |
| Irregular | 31 (55.4) | 26 (47.3) | 21 (80.8) | 19 (79.2) |
| Margin | ||||
| Circumscribed | 25 (44.6) | 20 (36.4) | 5 (19.2) | 4 (16.7) |
| Not circumscribed | ||||
| Irregular | 27 (48.2) | 31 (56.4) | 13 (50.0) | 14 (58.3) |
| Spiculated | 4 (7.1) | 4 (7.3) | 8 (30.8) | 6 (25.0) |
| Internal enhancement characteristics | ||||
| Homogeneous | 17 (30.4) | 21 (38.2) | 2 (7.7) | 6 (25.0) |
| Heterogeneous | 35 (62.5) | 31 (56.4) | 21 (80.8) | 17 (70.8) |
| Rim enhancement | 3 (5.4) | 2 (3.6) | 3 (11.5) | 1 (4.2) |
| Dark internal septations | 1 (1.8) | 1 (1.8) | 0 (0) | 0 (0) |
| Non-mass enhancement | 21 (27.3) | 22 (28.6) | 8 (23.5) | 10 (29.4) |
| Distribution | ||||
| Focal | 11 (52.4) | 10 (45.5) | 2 (25.0) | 3 (30.0) |
| Linear | 1 (4.8) | 4 (18.2) | 3 (37.5) | 2 (20.0) |
| Segmental | 5 (23.8) | 3 (13.6) | 1 (12.5) | 3 (30.0) |
| Regional | 4 (19.0) | 5 (22.7) | 2 (25.0) | 2 (20.0) |
| Internal enhancement patterns | ||||
| Homogeneous | 1 (4.8) | 3 (13.6) | 2 (25.0) | 0 (0) |
| Heterogeneous | 20 (95.2) | 16 (72.7) | 5 (62.5) | 6 (60.0) |
| Clumped | 0 (0) | 3 (13.6) | 1 (12.5) | 2 (20.0) |
| Clustered ring | 0 (0) | 0 (0) | 0 (0) | 2 (20.0) |
Data are numbers of lesions, and the values in parentheses are percentages. MRI findings were described by two radiologists in consensus who did not participate in the reader study of both protocols. AB = abbreviated breast, FD = full diagnostic