This List Breaks Down The Stages Of Breast Cancer And What They MeanThe Alzheimer's Site
In the following list, we’ll explore the five stages of breast cancer: stage 0 to stage 4. The diagnosis is based on where the cancer began in the breast, and what other areas of the breast or body are also affected. As the stages increase, so does the complexity of the cancer.
Stage 0 & Stage 1
Stage 0, or ductal carcinoma in situ, is also known as pre-cancer. It is a non-invasive cancer found in the linings of the milk ducts. For stage 1 cancer, the tumor is less than 2cm in size. It is still considered invasive — though it has not yet spread to surrounding lymph nodes or outside the breast tissue. Click the “NEXT >” button below the video to learn about stages 2a and 2b.