What Is Breast Cancer?
Breast cancer is a disease in which breast tissue cells start growing abnormally and uncontrollably.
- The most common form of breast cancer is ductal carcinoma, which begins with cells in the breast ducts, tubes that carry breast milk to the nipple.
- Less common forms of breast cancer include lobular carcinoma, which begins in the lobules – tissues that make breast milk – and inflammatory breast cancer, which causes the breast to become red, swollen and abnormally warm.
- Rare forms of breast cancer include those in other types of cells (such as lymph/blood vessels or connective tissues within the breast) and breast cancer in men.
- Additionally, patients may also be diagnosed with ductal carcinoma in situ (DCIS) or lobular carcinoma in situ (LCIS) in which cells have undergone cancerous changes but are confined within the breast duct or lobule, respectively. DCIS and LCIS are also known as breast pre-cancers or “Stage 0 breast cancer.”