Why has breast cancer become so common? The incidence of breast cancer has risen dramatically during the last four decades (Facts 1–3). Moreover, a growing international acceptance of Western style sexual and reproductive practices has been associated with an increase in worldwide breast cancer rates.
Who is most likely to develop breast cancer? Most breast cancers are found in women who are 50 years old or older. Some women will get breast cancer even without any other risk factors that they know of. Having a risk factor does not mean you will get the disease, and not all risk factors have the same effect.
Is breast cancer getting more common? Although breast cancer in young women is uncommon, it’s the most common malignant tumor in young women, 15 to 39. The lifetime, well, not all your life but life up to 40, risk of getting breast cancer was 1 in 173 when it was reported in 2009. Now, that’s compared to the whole lifetime risk.
Why is left breast cancer more common? Background. Women are more likely to develop cancer in the left breast than the right. Such laterality may influence subsequent management, especially in elderly patients with heart disease who may require radiation therapy. The purpose of this study was to explore possible factors for such cancer laterality.