Table 6.
Breast MRI features in 56 patients with TNBC by AR status
| AR+ (n=18) |
AR− (n=38) |
|
|---|---|---|
| Imaging feature | N (%) | N (%) |
| Amount of fibroglandular tissue | ||
| Extremely fibroglandular | 0 (0) | 4 (11) |
| Heterogeneously fibroglandular | 14 (78) | 23 (61) |
| Scattered fibroglandular tissue | 4 (22) | 11 (29) |
| Background parenchymal enhancement | ||
| Marked | 1 (6) | 4 (3) |
| Mild | 6 (33) | 19 (50) |
| Minimal | 1 (6) | 4 (11) |
| Moderate | 10 (56) | 14 (37) |
| Lesion type | ||
| Non-mass enhancement | 0 (0) | 5 (13) |
| Mass | 18 (100) | 33 (87) |
| Mass shape* | ||
| Irregular | 8 (44) | 8 (24) |
| Oval | 10 (56) | 24 (73) |
| Round | 0 (0) | 1 (3) |
| Mass margin* | ||
| Circumscribed | 3 (17) | 16 (48) |
| Irregular | 14 (78) | 16 (48) |
| Spiculated | 1 (6) | 1 (3) |
| Mass internal enhancement characteristics* | ||
| Heterogeneous | 14 (78) | 20 (61) |
| Homogeneous | 0 (0) | 1 (3) |
| Rim enhancement | 4 (22) | 12 (36) |
| Non-mass enhancement distribution** | ||
| Linear | 0 (0) | 1 (20) |
| Multiple regions | 0 (0) | 3 (60) |
| Regional | 0 (0) | 1 (20) |
| Non-mass enhancement internal enhancement pattern** | ||
| Clumped | 0 (0) | 1 (20) |
| Heterogeneous | 0 (0) | 3 (60) |
| Homogeneous | 0 (0) | 1 (20) |
*
A denominator of 18 for the AR+ group and a denominator of 33 for the AR− group were used to calculate percentages.
**
A denominator of 5 for the AR− group was used to calculate percentages.