Table 2 Characteristic of CUS of molecular subtype groups

BI-RADS

 3

2 (1.3%)

1 (2.1%)

1 (1.6%)

0 (0%)

0 (0%)

 4a

35 (22%)

18 (38%)

11 (17%)

2 (7.4%)

4 (22%)

 4b

75 (48%)

20 (42%)

28 (44%)

16 (59%)

11 (61%)

 4c

34 (22%)

9 (19%)

16 (25%)

7 (26%)

2 (11%)

 5

11 (7.0%)

0 (0%)

8 (13%)

2 (7.4%)

1 (5.6%)

Palpable mass

102 (65%)

25 (52%)

45 (70%)

22 (81%)

10 (56%)

Location

 Left

83 (53%)

29 (60%)

33 (52%)

15 (56%)

6 (33%)

 Right

74 (47%)

19 (40%)

31 (48%)

12 (44%)

12 (67%)

Distance to nipple

 < 20 mm

89 (57%)

29 (60%)

33 (52%)

17 (63%)

10 (56%)

 > 20 mm

68 (43%)

19 (40%)

31 (48%)

10 (37%)

8 (44%)

Maximum diameter

19.00(14.00,28.00)

17.00(11.75,24.25)

19.00(15.00,30.00)

25.00(18.50,35.00)

18.00(15.25,21.75)

Aspect ratio

0.73(0.58,0.86)

0.74(0.61,0.87)

0.75(0.64,0.87)

0.60(0.49,0.73)

0.70(0.61,0.86)

Blood flow signal

 0

15 (9.6%)

6 (13%)

6 (9.4%)

2 (7.4%)

1 (5.6%)

 1

54 (34%)

18 (38%)

21 (33%)

7 (26%)

8 (44%)

 2

58 (37%)

18 (38%)

25 (39%)

10 (37%)

5 (28%)

 3

30 (19%)

6 (13%)

12 (19%)

8 (30%)

4 (22%)

Resistance index

0.80(0.72,1.00)

0.77(0.67,1.00)

0.82(0.71,1.00)

0.81(0.75,1.00)

1.00(0.76,1.00)

Calcification

103 (66%)

28 (58%)

41 (64%)

24 (89%)

10 (56%)

Margin

 Clear

75 (48%)

23 (48%)

32 (50%)

11 (41%)

9 (50%)

 Unclear

82 (52%)

25 (52%)

32 (50%)

16 (59%)

9 (50%)

Shape

 Irregular

151 (96%)

46 (96%)

64 (100%)

25 (93%)

16 (89%)

 Regular

6 (3.8%)

2 (4.2%)

0 (0%)

2 (7.4%)

2 (11%)

Echogenicity

 Heterogeneous

127 (81%)

34 (71%)

53 (83%)

26 (96%)

14 (78%)

 Homogeneous

30 (19%)

14 (29%)

11 (17%)

1 (3.7%)

4 (22%)

Peripheral duct

60 (38%)

17 (35%)

24 (38%)

11 (41%)

8 (44%)

Posterior echo attenuation

21 (13%)

7 (15%)

7 (11%)

5 (19%)

2 (11%)