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Breast cancer is a kind of cancer that begins as a growth of cells in the breast tissue. After skin cancer, breast cancer is the most common cancer diagnosed in women in the United States. But breast cancer doesn't just happen in women.
Learn what causes breast cancer (and what doesn't cause breast cancer, despite common myths).
What causes breast cancer? Experts know breast cancer happens when breast cells mutate and become cancerous cells that divide and multiply to create tumors. They aren’t sure what triggers that change. However, research shows there are several risk factors that may increase your chances of developing breast cancer. These include:
Learn what causes breast cancer including inherited (BRCA) or acquired changes in certain genes, lifestyle, or hormone changes.
The precise causes of breast cancer are unclear, but we know the main risk factors. Still, most women considered at high risk for breast cancer do not get it, while many with no known risk...
Key facts. Breast cancer caused 670 000 deaths globally in 2022. Roughly half of all breast cancers occur in women with no specific risk factors other than sex and age. Breast cancer was the most common cancer in women in 157 countries out of 185 in 2022. Breast cancer occurs in every country in the world.
Causes and Risk Factors. 15 min read. What Is Breast Cancer? Breast cancer is when the cells under one or both breasts grow out of control. Those cells may spread beyond your breasts....
Breast cancer may cause symptoms such as a lump, pain, or skin changes to the breast or nipple. Anyone with a breast lump should see a healthcare professional.
Get detailed information about breast cancer risks, causes, symptoms, treatments, research, and more.
Breast cancer diagnosis often begins with an exam and a discussion of your symptoms. Imaging tests can look at the breast tissue for anything that's not typical. To confirm whether there is cancer or not, a sample of tissue is removed from the breast for testing.