Key Facts
Breast cancer is the most commonly diagnosed cancer worldwide. In the US, approximately 1 in 8 women will develop invasive breast cancer during their lifetime. Early detection — through self-awareness, clinical examination, and appropriate screening — significantly improves treatment outcomes.
Risk Factors
Risk factors include age (risk increases with age), family history, certain genetic mutations (BRCA1 and BRCA2), personal history of breast conditions, dense breast tissue, hormone use, and lifestyle factors including alcohol consumption. The majority of people diagnosed have no known risk factors beyond age and sex — awareness is important for everyone.
Warning Signs
- A new lump or thickening in the breast or armpit
- Change in size, shape, or appearance of the breast
- Dimpling, puckering, or changes in skin texture
- Nipple inversion or changes in nipple appearance
- Nipple discharge, especially if bloody
- Persistent unexplained pain in one area
Reputable Resources
- National Breast Cancer Foundation — education, early detection resources, and support
- BreastCancer.org — comprehensive information on diagnosis and treatment
- American Cancer Society — screening guidelines and support resources
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