Breast cancer is cancer that starts in the breast tissue.
Ductal carcinoma starts in the tubes (channels) that the mother's milk to the nipple. Most breast cancers are this type.
Lobular carcinoma starts in parts of the breast, called lobules to produce the milk.
In rare cases, breast cancer can start in other areas of the breast.
Many breast cancers are sensitive to the hormone estrogen. This means that estrogen causes breast cancer tumor to grow. The cancer is called estrogen receptor positive cancer or ER positive.
Some women have called HER2-positive. HER2 refers to a gene to grow, the cells divide and repair themselves. If the cells have too many copies of this gene, cells - grow faster - including cancer cells. Experts believe that women with HER2-positive, a more aggressive disease and increased risk of recurrence than those without this species.
The male breast cancer. Symptoms include breast lump and breast pain and tenderness.