Brest Cancer Essay

2052 WordsJul 14, 20119 Pages
National college | Breast Cancer | Med 273 Invasive Clinical | | 7/29/2010 | | Breast Cancer Breast Cancer is a malignant tumor that has developed from cells in the breast. Breast Cancer is an uncontrolled growth of breast cells. Usually breast cancer either begins in the cells of the lobules, which are the milk-producing glands, or the ducts, the passages that drain milk from the lobules to the nipple. Less commonly, breast cancer can begin in the stromal tissues, which include the fatty and fibrous connective tissues of the breast. [ (Institute) ] Cancer occurs as a result of mutations, abnormal changes, in the gene responsible for regulating the growth of cells and keeping them healthy. The genes are in each cell’s nucleus, which acts as the “control room” of each cell. Normally, the cells in our bodies replace themselves through an orderly process of cell growth: healthy new cells take over as old ones die out. But over time, mutations can “turn on” certain genes and “turn off” others in cell. That changed cell gains the ability to keep dividing without control or order, producing more cells just like it and forming a tumor. A tumor can be benign (noncancerous) or malignant (cancerous). Benign tumors cells are close to normal in appearance, they grow slowly, and they do not invade nearby tissues or spread to other parts of the body. If malignant tumors are left unchecked they will eventually spread beyond the original tumor to other parts of the body. ( The breast is made up of lobes and no ducts. Each breast has 15 to 20 sections called lobes, which have many 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. Each breast also has blood vessels and lymph vessels. The lymph vessels carry colorless fluid called lymph.

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