Table 3 Radiological characteristics of benign or malignant lesions

Number of lesions by SMG

Nil

6

16.2%

0

0.0%

14.506

< 0.001*

Single lesion

31

83.8%

65

75.6%

2 lesions

0

0.0%

12

14.0%

3 lesions

0

0.0%

5

5.8%

4 lesions

0

0.0%

4

4.7%

BIRADS class by SMG

BIRADS 1

4

10.8%

3

3.5%

31.321

< 0.001*

BIRADS 2

0

0.0%

0

0.0%

BIRADS 3

15

40.5%

8

9.3%

BIRADS 4

16

43.2%

24

27.9%

BIRADS 5

1

2.7%

3

3.5%

BIRADS 6

1

2.7%

48

55.8%

Number of enhanced lesions by CESM

Nil

14

37.8%

8

9.3%

22.991

< 0.001*

Single lesion

22

59.5%

39

45.3%

2 lesions

0

0.0%

12

14.0%

3 lesions

1

2.7%

21

24.4%

4 lesions

0

0.0%

5

5.8%

5 lesions

0

0.0%

1

1.2%

Grade of enhancement

No enhancement

16

43.2%

8

9.3%

25.294

< 0.001*

Minimal

0

0.0%

12

14.0%

Mild

10

27.0%

1

1.2%

Moderate

8

21.6%

6

7.0%

Marked

3

8.1%

59

68.6%

BIRADS class by CESM

BIRADS 1

0

0.0%

0

0.0%

71.990

< 0.001*

BIRADS 2

28

75.7%

1

1.2%

BIRADS 3

1

2.7%

1

1.2%

BIRADS 4

7

18.9%

30

34.9%

BIRADS 5

0

0.0%

8

9.3%

BIRADS 6

1

2.7%

46

53.5%

BIRADS class by SMG

Probably benign (BIRADS 1–3)

19

51.4%

11

12.8%

20.859

< 0.001^§

Probably malignant BIRADS 4–6

18

48.6%

75

87.2%

BIRADS class by CESM

Probably benign (BIRADS 1–3)

29

78.4%

2

2.3%

79.375

< 0.001^§

Probably malignant BIRADS 4–6

8

21.6%

84

97.7%

Marked enhancement

No to moderate enhancement

34

91.9%

27

31.4%

37.874

< 0.001^§

Marked enhancement

3

8.1%

59

68.6%