Breast cancer Breast cancer is a type of cancer that primarily affects the cells in the breast tissue. It occurs when normal cells in the breast undergo genetic mutations that cause them to divide and grow in an uncontrolled manner. These abnormal cells form a tumor that can be either benign (non-cancerous) or malignant (cancerous).Breast cancer is predominantly found in women, although it can also affect men, albeit much less frequently. It is the most common cancer among women worldwide, with varying rates depending on geographic location and other factors.There are several types of breast cancer, but the most common form is invasive ductal carcinoma, which begins in the milk ducts and spreads to surrounding breast tissue. Other less common types include invasive lobular carcinoma, ductal carcinoma in situ (DCIS), and inflammatory breast cancer, among others.Risk factors for breast cancer include increasing age, family history of the disease, certain gene mutations (such as BRCA1 and BRCA2), early onset of menstruation, late onset of menopause, hormonal factors (e.g., prolonged estrogen exposure), obesity, alcohol consumption, and previous radiation therapy.Symptoms of breast cancer can vary but often include a lump or thickening in the breast or underarm area, changes in breast size or shape, nipple changes (such as inversion or discharge), breast pain or tenderness, skin dimpling or puckering, and swollen lymph nodes.Early detection is crucial for better treatment outcomes. Regular breast self-exams, clinical breast exams by healthcare professionals, and mammograms are important screening methods. If breast cancer is suspected, further diagnostic tests like biopsies, imaging scans, and genetic testing may be conducted to confirm the diagnosis and determine the extent of the disease.Treatment options for breast cancer depend on the stage, type, and characteristics of the tumor, as well as individual factors. Common treatment modalities include surgery (such as lumpectomy or mastectomy), radiation therapy, chemotherapy, hormone therapy, targeted therapy, and immunotherapy. Treatment plans are often multidisciplinary, involving a team of healthcare professionals.Breast cancer awareness, education, and research efforts continue to strive towards improving prevention strategies, early detection, and treatment options, with the ultimate goal of reducing mortality rates and improving the quality of life for those affected by this disease.