CAUSES OF BREAST CANCER
* GENETICS (BRCA1 and BRCA2): Inherited mutations increase breast cancer risk.
* FAMILY HISTORY: First-degree relatives (parents, siblings) with breast cancer.
* AGE: Risk increases after 40; peaks between 50-69.
* DENSE BREASTS: Higher tissue density increases cancer risk.
* RADIATION EXPOSURE: Previous radiation therapy or imaging.
* HORMONAL FACTORS:
- Estrogen and progesterone exposure:
- Early menstruation (before 12)
- Late menopause (after 55)
- Hormone replacement therapy
* LIFESTYLE FACTORS
- Obesity
- Sedentary lifestyle
- Alcohol consumption (2+ drinks/day)
- Smoking