Approximately 30% of breast cancer cases can be attributed to known risk factors. Risk factors do not necessarily cause cancer; they suggest a suspected association. Having one or more risk factors does not mean that a woman will develop breast cancer. However, having no risk factors for the disease does not mean a woman is protected. The current known risk factors for developing breast cancer are:

• Being a woman

• Having a mother, grandmother or sister who has had breast cancer, particularly if the cancer appeared before menopause

• Bearing the 1st child after the age of 30

• Never bearing a child

• Smoking

• Being over the age of 50

• Having a history for a previous cancer such as uterine or ovarian

• Having a diagnoses of a typical hyperplasia or benign breast disease     

  with hyperplasia

​Breast Cancer Risks Factors


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