Are women with large breasts more likely to get breast cancer?

Study findings on a potential link between breast size and breast cancer have been mixed.
Some studies have found having a larger breast size increases risk, while others have found no link between breast size and risk but few studies have suggested that breast size increases risk among thin women, but not among heavy women.
A large study suggests that women with dense breasts are more likely to be diagnosed with breast cancer and the breast cancer is likely to be more aggressive.
Other research has shown that dense breasts:

• Have as much as 6 times higher risk of developing breast cancer
• Can make it harder for mammograms to detect cancer; breast cancers (which aren't fatty) are easier to see on a mammogram when surrounded by fatty tissue.

If you're getting screening mammograms, you may want to ask your doctor about what your mammograms suggest about your breast density and how breast density might affect your breast cancer risk.