BREAST CANCER RISK
Risk Factors for Breast Cancer
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- Current age 65 years or older
- Menarche before age 12
- Menopause after age 55
- No pregnancies or first pregnancy after age
30
- Alcohol consumption greater than two
drinks per day
- Body mass index in the 80th percentile or
55 years or older
- Exposure to high dose ionizing radiation
- Family history of first or second degree
relatives with breast cancer
- BRCA1 or 2 genetic mutation
- Hormone replacement greater than 5 years
with combined estrogen and progesterone
- About 18% of new cases of breast cancer
occur among women in their 40s
- 77% of women with breast cancer are older
than 50 years at diagnosis
- 2/3 of breast cancers have receptors to
estrogen and progesterone (ER+ and PR+)
- 1 in 8 women who live to the age of 90 will
be treated for breast cancer in their lifetime
Brenda L. Kehoe, M.D.
Click here to read how risk is
calculated with the Gail model.
- 85% of breast cancers are found in women
with no family history
- At least 40% of breast cancers are
identified by breast self-exam
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