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CANCER
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Structure of the Breast
Each breast has 15 to 20 sections called lobes. Each lobe has several smaller sections called lobules. Lobules end in dozens of tiny bulbs that can produce milk. The lobes, lobules, and bulbs are linked by thin tubes called ducts. These ducts lead to the nipple in the center of the breast. The breasts are glands that make and release milk in women after pregnancy.
Each breast also has blood vessels and lymph vessels. These vessels carry excess fluid out of your breast. The fluid is called lymph. The lymph vessels lead to small bean-shaped structures called lymph nodes. Clusters of lymph nodes are found in the armpit (called the axilla), above the collarbone, and in the chest.
