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Table 2 Breast area, dense area and percent density in the four quadrants of four groups of women with tumors in different quadrants (mean ± standard deviation)

From: Evaluation of the association between quantitative mammographic density and breast cancer occurred in different quadrants

 

UO tumor group

UI tumor group

LO tumor group

LI tumor group

Breast Area (cm2)

 Upper-Outer

39 ± 16

35 ± 17

33 ± 5

32 ± 11

 Upper-Inner

35 ± 14

34 ± 17

31 ± 6

30 ± 10

 Lower-Outer

25 ± 11

23 ± 11

24 ± 5

21 ± 7

 Lower-Inner

22 ± 9

23 ± 10

22 ± 5

18 ± 6

Dense Area (cm2)

 Upper-Outer

7.4 ± 3.2

6.4 ± 3.2

7.4 ± 1.8

6.4 ± 1.9

 Upper-Inner

6.1 ± 2.3

6.0 ± 3.1

6.5 ± 2.1

5.7 ± 1.7

 Lower-Outer

5.5 ± 2.6

5.2 ± 2.5

6.1 ± 2.1

4.5 ± 1.3

 Lower-Inner

4.2 ± 2.2

4.8 ± 2.3

5.2 ± 2.2

3.8 ± 1.4

Percent Density (%)

 Upper-Outer

19.9 ± 6.0

18.9 ± 7.0

22.7 ± 5.8

20.5 ± 4.3

 Upper-Inner

18.1 ± 5.4

17.9 ± 6.1

20.9 ± 6.6

19.3 ± 2.5

 Lower-Outer

22.7 ± 8.3

22.8 ± 7.0

25.5 ± 6.9

22.6 ± 5.0

 Lower-Inner

19.9 ± 8.2

21.5 ± 6.3

22.9 ± 6.2

20.9 ± 4.7