Breast cancer is a malignant tumor that develops in the cells of the breast, often originating from the lining of the milk ducts or lobules. It is one of the most common types of cancer among women and can be influenced by genetic factors, hormonal changes, and lifestyle choices. Understanding the role of tumor suppressors and proto-oncogenes is crucial, as mutations in these genes can lead to uncontrolled cell growth, contributing to the development and progression of breast cancer.
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