The breast is comprised of organs called lobules that can make drain and thin tubes called conduits that convey the drain from the lobules to the nipple. Breast tissue likewise contains lymph nodes, fat and connective tissue, arteries and veins. Breast cancer is a cancer that starts in the cells of the lobules or in the different tissues of the breast. The cancer may be of various types. Breast cancer that has spread from where it started in the pipes or lobules to encompassing tissue is called intrusive breast cancer. In incendiary breast cancer, the breast looks red and swollen and feels warm on the grounds that the tumor cells hinder the lymph vessels in the skin.

Radical mastectomy is the most extensive type of mastectomy, the part of breast tissue being removed is:

• The surgeon removes the entire breast.
• Levels I, II, and III of the underarm lymph nodes are removed.
• The surgeon also removes the chest wall muscles under the breast.