Breast cancer (breast) stage III. Definition

Medical Definition: Breast cancer (breast) stage III

Breast cancer (breast) in Stage III is divided into stages IIIA, IIIB and IIIC. In stage IIIA, (1) no tumor is found in the breast, but cancer is found in axillary lymph nodes (under arm) that are attached to each other or other structures, or cancer may be found in the lymph nodes near the sternum, or (2) the tumor is two centimeters or smaller and the cancer has spread to axillary lymph nodes that are connected to each other or other structures, or cancer may have spread to lymph nodes near the breastbone; or (3) the tumor is larger than two centimeters but not more than five centimeters and the cancer has spread to axillary lymph nodes that are connected to each other or other structures, or cancer may have spread to lymph nodes near the sternum, or (4) the tumor is larger than five centimeters and the cancer has spread to axillary lymph nodes that may be attached to each other or other structures, or cancer may have spread to lymph nodes near the breastbone . In stage IIIB, the tumor may be any size and cancer (1) has spread to the chest wall or skin of the breast, and (2) may have spread to axillary lymph nodes that may be attached other or to other structures, or cancer may have spread to lymph nodes near the breastbone. In stage IIIC, no tumor is found in the breast or the tumor may be any size and may have spread to the chest wall or skin of the breast. Cancer has spread to lymph nodes above or below the collarbone and may have spread to axillary lymph nodes or to lymph nodes near the breastbone. In operable stage IIIC, cancer (1) is in 10 or more axillary lymph nodes, or (2) is found in the lymph nodes beneath the collarbone, or (3) is found in axillary lymph nodes and in lymph nodes near the breastbone. In stage IIIC is not operable, the cancer has spread to lymph nodes above the collarbone.

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