Breast cancer is a cancer originating from breast tissue, most commonly from inner lining of milk ducts or the lobules that supply the ducts or the milk. Breast cancer is most often discovered when a woman feels a lump in her breast. Changes in breast size or shape such as skin dimpling, nipple inversion or spontaneous single-nipple discharge may signal breast cancer.
There are many breast cancer risk factors They are listed below:
The presence of certain genes (BRCA1, BRCA2 and other) can influence breast cancer. A woman risk of breast cancer increases if her mother, sister, or daughter has had breast cancer at their young age.
Amongst the breast cancer risk factors is old age. Breast cancer is common with old age and uncommon in women under age 35. Most breast cancer occurs in women above the age 50 and 60
Breast cancer occurs more often in white women than among black women, Hispanic or Asian women.
The longer a woman is exposed to estrogen, the more the risk of breast cancer because the female hormone estrogen stimulates breast cancer. The risk is high in women who began menstruation at an early age i.e. before the age of 12, experience menopause late (after age 55), never had children, or took hormone replacement therapy for long periods of time.
- Later Childbearing
Woman who have their first child at the age of 30 or above have a greater risk of breast cancer than women who had their at a younger age. The most protection comes from childbirth followed by breastfeeding.
Women who smoke have a greater risk of breast cancer than women who don’t.
Women who exercise regularly have up to a 60% reduction in the risk of breast cancer compared with women with low level of activity
- Alcohol Consumption
Woman who have one drink a day have a 10% greater risk; those who drink two drinks have a 20% increased, and so on.
- Environmental Factors
Environmental factor can play a major role in the development of breast cancer. Exposure to xenoestrogens (synthetic compounds that mimic estrogen), pesticides, herbicides, power lines, radiation and lack of exposure to sunlight.
10. Breast Density
Women with dense breast have a higher risk of cancer than those with fattier breast tissue, because breast cancer occurs more in dense tissue (Lobes and Ducts) not in fatty tissue.
11. Dietary Factors
The more over weight a woman is the greater risk of breast cancer. Women with Increase intake of saturated fat and decrease intakes of antioxidant, dietary fiber, Omega-3 fatty acids and dietary phytoestrogen also have higher risk of breast cancer.