In the natural course of things, cells in the body only divide when new ones are required. Tumors form when cells in a particular section of the body expand and divide out of control. The tumor is deemed benign if the cells that are out of control are normal cells (not cancerous). The tumor is classified as malignant when the out-of-control cells are aberrant and do not function normally in the body (cancerous).
Breast cancer develops in the cells of the breasts. Breast cancer develops when some breast cells begin to grow abnormally, according to doctors. These cells divide at a faster rate than healthy cells and continue to grow, generating a lump or mass. Cells in your breast may spread (metastasize) to your lymph nodes or other places of your body.
Cells in the milk-producing ducts known as invasive ductal carcinoma are the most common source of breast cancer. Breast cancer can start in the glandular tissue called lobules are known as invasive lobular carcinoma, or in other cells or tissue within the breast.
As per Mayo clinic reports, 5 to 10% of breast tumors are caused by gene abnormalities passed down through the generations. Normal breast cells can become cancerous due to changes or mutations in their DNA. Certain DNA mutations are passed down from parents and can dramatically raise your chances of developing breast cancer. Other lifestyle-related risk factors, such as what you eat and how much exercise you get, can raise your risk of breast cancer, but it’s unclear how some of these risk factors trigger normal cells to turn cancerous.
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