Table 4 The MR morphology descriptors and contrast uptake features in the study
Descriptors | Luminal B, n = 82/257 | HER2-enriched, n = 34/89 | Total (n = 116/346) | ||
|---|---|---|---|---|---|
Count | N% | Count | N% | ||
Mass (n = 51, 44%) | |||||
Shape | |||||
Rounded/oval | 12 | 30 | 8 | 72.7 | 20 |
Irregular | 28 | 70 | 3 | 27.3 | 31 |
Margin | |||||
Indistinct | 19 | 47.5 | 8 | 72.7 | 29 |
Spiculated | 21 | 52.5 | 3 | 27.3 | 22 |
Internal enhancement | |||||
Homogenous | 13 | 32.5 | 8 | 72.7 | 21 |
Heterogeneous/rim | 27 | 67.5 | 3 | 27.3 | 30 |
Non-mass (n = 65, 56%) | |||||
Distribution | |||||
Diffuse | – | – | 13 | 56.5 | 13 |
Segmental | 33 | 78.6 | 4 | 17.4 | 37 |
Regional | 9 | 21.4 | 6 | 26.1 | 15 |
Enhancement | |||||
Yes | 44 | 100 | 48 | 100 | 92 |
No | – | – | – | – | – |
Kinetics curve | |||||
Initial phase | |||||
Fast | 25 | 30.4 | 9 | 26.5 | 34 |
Medium | 51 | 62.2 | 17 | 50 | 68 |
Slow | 6 | 7.4 | 8 | 23.5 | 14 |
Fate | |||||
Wash out | 70 | 85.4 | 17 | 50 | 87 |
Plateau | 4 | 4.9 | 9 | 26.5 | 13 |
Progressive | 8 | 9.7 | 8 | 23.5 | 16 |