There are two big benefits that come from knowing the types of breast cancer, especially after you receive a diagnosis. Over time, DCIS, which is also called stage 0 breast cancer, may progress to invasive breast cancer if it is not caught and treated. Rare breast cancersInflammatory breast cancer (IBC)Unlike other forms of breast cancer that form a lump in the breast, this rare breast cancer causes swelling and redness, which is caused by cancer cells blocking lymph vessels in the skin, according to the . Here’s what you need to know about each breast cancer subtype:Hormone receptor positive (luminal) breast cancerSome breast cancers are fueled by the hormones estrogen and/or progesterone. If you test positive for either the estrogen or progesterone hormone, your breast cancer is considered hormone receptor positive breast cancer and will likely be treated with hormonal therapies.