ABSTRACT
Breast cancer affects roughly 1 in 10 women in the developed world and is the commonest cause of death in women aged 40-50. The incidence of breast cancer increases with increasing age (rare before age 30), although death rates peak at 40-50 years and then drop off, probably because older women die of other causes before breast cancer becomes significant. Breast cancer is more common in Caucasian women than in women of African or Asian descent.
