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Breast Cancer
A National Cancer Institute (NCI)
report estimates that about 1 in 8 women in the United States
(approximately 13.3 percent) will develop breast cancer during
her lifetime. Breast cancer incidence increases with increase
in age of women. Hereditary genetic mutations cause about 5% of
breast cancers.
Risk factors :
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Gender
Breast cancer occurs nearly 100 times more often in women
than in men.
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Age
| 30 - 40 yr.
. . . . 1 out of 252 |
40 - 50 yr.
. . . . . . 1 out of 68
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| 50 - 60 yr .
. . . .1 out of 35 |
60 - 70 yr .
. . . . . . 1 out of 27 |
| Ever . . . .
. . . . 1 out of 8 |
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Previous history of breast cancer
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Previous breast irradiation
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Family history and genetic factors
Having a close relative, such as a mother or sister, with
breast cancer increases the risk.
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Benign breast disease
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Previous breast biopsy in which the tissue showed atypical
hyperplasia
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Menstrual periods that began early in life
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Menopause began later in life
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Lifestyle-related risk factors: Smoking, not having
children, or first child after age 30, oral contraceptives,
obesity and a high-fat diet, physical inactivity, alcohol,
long-term, post-menopausal use of combined estrogen and
progestin (HRT)
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Environmental risk factors: Exposure to pesticides, or
other chemicals, is currently being examined as a possible
risk factor.
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