Stage IIIB breast cancer. The drawing on the left is a cross section of the breast showing that cancer has spread to the chest wall. The ribs, muscle, and fatty tissue are also shown. The drawing on the right shows the tumor has spread to the skin of the breast. An inset shows inflammatory breast cancer.

Stage IIIB breast cancer. The tumor may be any size and cancer has spread to the chest wall and/or to the skin of the breast and caused swelling or an ulcer. Cancer may have spread to up to 9 axillary lymph nodes or the lymph nodes near the breastbone. Cancer that has spread to the skin of the breast may be inflammatory breast cancer.

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