Types of Breast Cancer

What are the types of breast cancer, and what do they mean? Breast cancer types are determined by the way a sample of cells from the tumor, collected during a breast biopsy or breast cancer surgery, looks under a microscope. Breast cancers are also classified according to how sensitive they are to the hormones estrogen and progesterone, their levels of certain proteins that play a role in breast cancer growth (such as HER2), their genetic makeup, and other characteristics. 

• Ductal carcinoma in situ (DCIS)
• Invasive ductal carcinoma
• Invasive lobular carcinoma (ILC)
• Lobular carcinoma in situ (LCIS)
• Inflammatory breast cancer (IBC)
• Breast sarcoma