Breast Cancer Risk Factors

Cancer occurs due to mutations or changes in the genes responsible for regulating the normal growth of cells and keeping them in a healthy condition. These mutated genes may be inherited from parents, or may result from external influences of radiation or cancer-causing chemicals, or wear and tear during the ageing process. Hormones also play a major role in the development of breast cancer.

Factors that could increase the risk of developing breast cancer

  • Age
  • Being a woman
  • Family or previous history of breast cancer
  • A history of ADH, DCIS or LCIS
  • BRCA 1 or 2 positive
  • Dense breast tissue
  • Early menstruation (before age 12) and late menopause (after age 55)
  • Use of birth control pills
  • Use of HRT
  • Heavy smoking and alcohol consumption
  • Being overweight or obese
  • Not breastfeeding after child birth
  • Westmed Breast Cancer Institute
  • Breast Care Surgeons of Australia New Zealand
  • University of Sydney
  • University of Woolongong
  • Royal Australasian College of Surgeons
  • Royal Hospital for Women
  • prime wales hospital
  • BreastScreen Australia