Table 2 Conventional MRI characteristics in patients with DCIS in comparison with DCISMI
Features | DCIS (n = 42) | DCISMI (n = 45) | P value |
|---|---|---|---|
Lesion side | 0.2821 | ||
 Left | 16(38.10%) | 23(51.11%) | |
 Right | 26(61.90%) | 22(48.89%) | |
Types of mammary glands | 0.7581 | ||
 a | 1(2.38%) | 1(2.22%) | |
 b | 4(9.52%) | 7(15.56%) | |
 c | 33(78.58%) | 31(68.89%) | |
 d | 4(9.52%) | 6(13.33%) | |
Lesion number | 0.4863 | ||
 Single | 39(92.86%) | 39(86.67%) | |
 Two and Multiple | 3(7.14%) | 6(13.33%) | |
MR type of lesion | 0.6694 | ||
 NME | 19(45.42) | 23(51.11%) | |
 Mass | 23(54.76%) | 22(48.89%) | |
Extent of DCIS (cm) | 0.813 | ||
  < 2.0 | 13(30.95%) | 12(26.67%) | |
 ≧2.0 | 29(69.05%) | 33(73.33%) | |
Intertumoral high SI on T2WI | 0.2302 | ||
 No | 2(4.76%) | 0 | |
 Yes | 40(95.24%) | 45(100.00%) | |
Peritumoral edema on T2WI | 0.0022 | ||
 No | 20(47.62%) | 7(15.56%) | |
 Yes | 22(52.38%) | 38(84.44%) | |
Initial enhancement | 0.1883 | ||
 Slow | 38(90.48%) | 44(97.78%) | |
 Medium | 3(7.14%) | 0 | |
 Fast | 1(2.38%) | 1(2.22%) | |
Enhancement peak (mean ± SD) | 1537 ± 206.1 | 1574 ± 231.9 | 0.4417 |
Delayed enhancement | 0.2647 | ||
 Persistent | 9(21.43%) | 11(24.44%) | |
 Plateau | 30(71.43%) | 26(57.78%) | |
 Washout | 3(7.14%) | 8(17.78%) | |
aHeterogeneous enhancement pattern |  < 0.0001 | ||
 No | 24(57.14%) | 3(6.67%) | |
 Yes | 18(42.86%) | 42(93.33%) | |
Necrosis within lasion | 0.5756 | ||
 No | 36(85.71%) | 36(80.00%) | |
 Yes | 6(14.29%) | 9(20.00%) | |
BI-RADS | 0.9046 | ||
 2 | 1(2.38%) | 2(4.44%) | |
 3 | 4(9.52%) | 4(8.89%) | |
 4 | 32(76.19%) | 32(71.11%) | |
 5 | 5(11.91%) | 7(15.56%) | |
NAC invasion on MRI | 0.4948 | ||
 No | 42(100.00%) | 43(95.56%) | |
 Yes | 0 | 2(4.44%) | |
Contralateral occult lesion on MRI | 0.0631 | ||
 No | 33(78.57%) | 42(93.33%) | |
 Yes | 9(21.43%) | 3(6.67%) |