Final answer:
Breast carcinomas typically spread through the axillary lymph nodes, which are located under the arm. From there, the cancer cells can further spread to other parts of the body through the lymphatic system. The most common sites for breast cancer metastasis are the bones, liver, and lungs.
Step-by-step explanation:
Breast carcinomas typically spread through the lymph nodes that are located in the axillary region, which is under the arm. These lymph nodes are called the axillary lymph nodes. The cancer cells can travel to the axillary lymph nodes through lymphatic vessels that pass by the primary tumor in the breast.
Once in the axillary lymph nodes, the cancer cells can further spread to other parts of the body through the lymphatic system. This is called regional metastasis. The most common sites for breast cancer metastasis include the bones, liver, and lungs, although it can also spread to other distant organs.
It's important to note that not all breast carcinomas will spread to the lymph nodes. The extent of lymph node involvement can vary from person to person and can impact the treatment approach and prognosis.