The stages of cancer depend on the size of the breast tumor and the severity of the spreading to other parts of the body, like the lymph nodes. More often than not, the stage is unknown until after surgery to remove a tumor in the breast or underarm. Breast Specialty of Baton Rouge has helped explain what those stages mean so that you can better understand yours or loved ones’ situation. Stage 0 breast cancer is early-stage and Stage IV is advanced cancer that has spread to o