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Table 2 Comparative analysis of conventional US characteristics of benign and malignant ductal lesions

From: The diagnostic value of contrast-enhanced ultrasonography in breast ductal abnormalities

Characteristics

Benign, n (%)

(n = 44)

Malignant, n (%)

(n = 38)

χ 2/t

P

Shape

  

16.067

 < 0.001*

 Regular

26(59.1)

6(15.8)

  

 Irregular

18(40.9)

32(84.2)

  

Margin

  

19.953

 < 0.001*

 Circumscribed

31(70.5)

8(21.1)

  

 Not circumscribed

13(29.5)

30(78.9)

  

Inner echo

  

14.024

 < 0.001*

 Homogeneous

26(59.1)

7(18.4)

  

 Heterogeneous

18(40.9)

31(81.6)

  

Size(cm)

1.43 ± 0.84

1.98 ± 0.99

-2.684

0.009*

Posterior feature

  

1.076

0.580

 None

42(95.5)

34(89.5)

  

 Enhancement

1(2.3)

2(5.3)

  

 Shadowing

1(2.3)

2(5.3)

  

Blood flow classification

  

12.775

0.002*

 0

15(34.1)

5(13.2)

  

 1

24(54.5)

16(42.1)

  

 2&3

5(11.4)

17(44.7)

  

Microcalcificationsa

  

16.791

 < 0.001*

 Presence

2(4.5)

16(42.1)

  

 Absence

42(95.5)

22(57.9)

  

MG

    

 Calcifications

15(34.1)

23(60.5)

  

 No calcification

29(65.9)

15(39.5)

  
  1. aThe microcalcifications seen on US were confirmed by mammography (MG). * P < 0.05