Table 4.
MRI characteristics of the DCIS, mIDC, and IDC group
| DCIS (n = 101) | mIDC (n = 49) | IDC (n = 44) | P value | |
|---|---|---|---|---|
| Mass (n = 87) | DCIS (n = 50) | mIDC (n = 18) | IDC (n = 19) | |
| MR-measured tumor size (cm) | 1.1 [0.9–1.6] | 2.2 [0.9–3.3] | 2.2 [1.6–5.1] | < 0.001 |
| Shape | 0.001 | |||
| Oval or round | 28 (56.0) | 4 (22.2) | 2 (10.5) | |
| Irregular | 22 (44.0) | 14 (77.8) | 17 (89.5) | |
| Margin | 0.001 | |||
| Circumscribed | 21 (42.0) | 3 (16.7) | 0 (0.0) | |
| Not-circumscribed | 29 (58.0) | 15 (83.3) | 19 (100.0) | |
| Enhancement pattern | 0.001 | |||
| Homogeneous | 19 (38.0) | 2 (11.1) | 0 (0.0) | |
| Heterogeneous | 26 (52.0) | 12 (66.7) | 11 (57.9) | |
| Rim | 5 (10.0) | 4 (22.2) | 8 (42.1) | |
| Intratumoral high SI on T2WI | 6 (12.2) | 4 (22.2) | 11 (61.1) | < 0.001 |
| Peritumoral edema on T2WI | 0 (0.0) | 3 (16.7) | 6 (33.3) | < 0.001 |
| NME (n = 107) | DCIS (n = 51) | mIDC (n = 31) | IDC (n = 25) | |
| MR-measured tumor size (cm) | 3.8 [2.3–5.0] | 4.9 [3.1–6.3] | 5.8 [4.2–6.6] | 0.002 |
| Distribution | 0.075 | |||
| Segmental | 34 (66.7) | 26 (83.9) | 19 (76.0) | |
| Linear | 2 (3.9) | 0 (0.0) | 0 (0.0) | |
| Focal | 10 (19.6) | 3 (9.7) | 2 (8.0) | |
| Regional | 4 (7.8) | 2 (6.5) | 0 (0.0) | |
| Diffuse | 1 (2.0) | 0 (0.0) | 4 (16.0) | |
| Enhancement pattern | 0.001 | |||
| Homogeneous | 17 (33.3) | 0 (0.0) | 3 (12.0) | |
| Heterogeneous | 16 (31.4) | 5 (16.1) | 4 (16.0) | |
| Clumped | 14 (27.5) | 22 (71.0) | 14 (56.0) | |
| Clustered ring | 4 (7.8) | 4 (12.9) | 4 (16.0) | |
| Kinetic feature (n = 194) | 0.763 | |||
| Initial enhancement | ||||
| Slow | 2 (2.0) | 2 (4.1) | 2 (4.5) | |
| Medium | 5 (5.0) | 1 (2.0) | 2 (4.5) | |
| Fast | 94 (93.1) | 46 (93.9) | 40 (90.9) | |
| Delayed enhancement | 0.383 | |||
| Persistent | 13 (12.9) | 5 (10.2) | 4 (9.1) | |
| Plateau | 16 (15.8) | 4 (8.2) | 3 (6.8) | |
| Washout | 72 (71.3) | 40 (81.6) | 37 (84.1) | |
| Peak enhancement (%) | 171.0 [127.5–220.0] | 206.0 [153.0–282.5] | 230.0 [190.5–294.0] | < 0.001 |
| Persistent component (%) | 60.0 [28.0-, 84.0] | 70.0 [49.5, 86.5] | 54.5 [36.0–76.0] | 0.205 |
| Plateau component (%) | 28.0 [12.5–43.0] | 24.0 [10.5–37.0] | 30.0 [19.0–40.5] | 0.343 |
| Washout component (%) | 5.0 [0.1–16.0] | 2.0 [0.3–10.0] | 7.5 [1.3–19.8] | 0.254 |
Data indicate the number of lesions (with percentages in parentheses) or the median values with range.
DCIS ductal carcinoma in situ; mIDC microinvasive ductal carcinoma; IDC invasive ductal carcinoma; SI signal intensity; T2WI T2-weighted image; NME nonmass enhancement