Women may have accessory breast tissue in the armpit region, with or without accessory nipples. These are a normal variant and can be safely ignored. Cancer arising in these sites is extremely rare.However, if they are unsightly, a surgery can be carried out to remove these accessory breast tissues, purely for cosmesis.
Breast cancer is a disease in which the cancer cells develop in a breast. Because of the mutations in the DNA, the cells grow abnormally and form a tumor. There are several types of breast cancer. The type of breast cancer is determined by which breast cells become cancerous.
Breast cancer may start in a variety of places in the breast. Ducts, lobules, and connective tissue are the three primary components of a breast.