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Definition of Breast Cancer
Breast cancer is cancer that forms in the cells of the breasts. Breast cancer can occur in both men and women, but it's far more common in women.
After skin cancer, breast cancer is the most common cancer diagnosed in women in the United States. But breast cancer rates have fallen in recent years, though doctors aren't certain why. Still, for many women, breast cancer is the disease they fear most.
Public support for breast cancer awareness and research funding has helped improve the diagnosis and treatment of breast cancer. Breast cancer survival rates have increased and the number of deaths has been declining, thanks to earlier detection, new treatments and a better understanding of the disease.
Each of your breasts contains 15 to 20 lobes of glandular tissue, arranged like the petals of a daisy.
The lobes are further divided into smaller lobules that produce milk during pregnancy and breast-feeding.
Small ducts conduct the milk to a reservoir that lies just beneath your nipple. Supporting this network is a deeper layer of connective tissue called stroma