What is breast cancer?

Breast cancer is a condition in which breast cells grow abnormally and divide without control or order. Breast cancer is the most common form of cancer in women. Early detection and prompt treatment help many women live long, full lives.

Are there different types of breast cancer?

There are different types of breast cancer. The most common is ductal carcinoma, which starts in the lining of the milk ducts of the breast. The other type of breast cancer is lobular carcinoma. This begins in the lobules of the breast, where breast milk is produced.

What is non-invasive breast cancer?

With non-invasive breast cancer, the cancer cells are confined to the ducts or lobules. This is also known as carcinoma in-situ. Ductal carcinoma in-situ (DCIS) is when the ductal cells divide abnormally but stay within the ducts.

What is invasive breast cancer?

Invasive breast cancer occurs when cells spread beyond the ducts or lobules. These cells first invade the surrounding breast tissue, and can possibly travel to the lymph nodes.