What breasts are made of, and where and how cancer starts.
Breast tissue is positioned in the breast, upper chest and the armpit. Each breast consists of 15-20 glands known as lobes, the place milk is produced. These lobes are connected to the nipple by tubes known as ducts. The structure of the lobes and ducts is a little bit like the branches of a tree. Breast cancer commonly begins within the lobes.
The rest of the breast is made of fatty tissue. The breast and armpit also consist of lymph nodes and