Table 2 Characteristics on mammography

 1.

Mass

Shape

n = 313

n = 361

Oval

90

28.8

120

33.2

Round

53

16.9

43

11.9

Irregular

170

54.3

198

54.8

Margins

Circumscribed

77

24.6

123

34.1

Obscured

93

29.7

99

27.4

Microlobulated

16

5.1

19

5.3

Indistinct

56

17.9

31

8.6

Spiculated

71

22.7

89

24.7

Density

High density

244

78.0

302

83.7

Equal density

66

21.1

57

15.8

Low density

1

0.3

0

0.0

Fat containing

2

0.6

2

0.6

 2.

Calcifications

Morphology

Amorphous

25

2.0

28

2.3

Coarse heterogeneous

33

2.7

40

3.3

Fine pleomorphic

47

3.8

45

3.7

Fine linear and branching

11

0.9

12

1.0

Distribution

Diffuse

64

65.3

62

62.0

Regional

7

8.9

8

8.0

Grouped

21

21.4

16

16.0

Linear

2

2

3

3.0

Segmental

4

4.1

10

10.0

3

Architectural distortion

38

3.1

48

3.9