How does breast cancer start

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Skip to Content. This is the first page of Cancer. Use the menu to see other pages.

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Perturbations in the foetal environment predispose individuals to diseases that become apparent in adulthood. These findings prompted researchers to hypothesize that foetal exposure to environmental oestrogens may play a role in the increased incidence of breast cancer observed in European and US populations over the last 50 years. There is widespread human exposure to bisphenol A, an oestrogenic compound that leaches from dental materials and consumer products.

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If you have been diagnosed with or are worried about breast canceryou may be wondering how fast it develops, grows, and spreads. In other words, when a cancer is found, you may wonder when it started, how fast will it double in size if not removed, and how quickly might it spread to lymph nodes, bones, or other regions of the body. These questions are important for many reasons and can vary depending on the type of breast cancer you have and its molecular characteristics.

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Click to see larger diagrams of the anterior view and cross-section view of the breast. Breast cancer is a disease in which cells in the breast grow out of control. There are different kinds of breast cancer. The kind of breast cancer depends on which cells in the breast turn into cancer.

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While many women go to the doctor after finding a lump, every woman should also be aware of other changes to the breast or nipple. For example, invasive ductal carcinoma IDCwhich forms in the milk ducts, may cause a distinct breast lump that you can feel. Invasive lobular carcinoma ILCwhich forms in milk-producing glands, may cause a thickening in the breast.

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Cells in the body normally divide reproduce only when new cells are needed. Sometimes, cells in a part of the body grow and divide out of control, which creates a mass of tissue called a tumor. If the cells that are growing out of control are normal cells, the tumor is called benign not cancerous.

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What is breast cancer? How common is breast cancer? At what age does breast cancer occur? Who does breast cancer affect?

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Each breast contains 15 to 20 lobes of glandular tissue, arranged like the petals of a daisy. The lobes are further divided into smaller lobules that produce milk for breast-feeding. Small tubes ducts conduct the milk to a reservoir that lies just beneath your nipple.

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Breast tissue is found in the breast, upper chest and the armpit. Each breast contains glands called lobes, where milk is produced. These lobes are connected to the nipple by tubes called ducts. The structure of the lobes and ducts is a bit like the branches of a tree.

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