From: Greatly increased occurrence of breast cancers in areas of mammographically dense tissue
Mammographic quadrant
CC
MLO
Density (%; mean ± SE)
Number of DCIS lesions
L
S
55.8 ± 4.2
17
M
47.9 ± 4.0
5
I
46.2 ± 4.0
4
38.3 ± 4.0
2