The first and most important breast cancer risk factor is being a female. Breast cancer can affect men, but they comprise only 1% of newly diagnosed breast cancers annually.
Other risk factors include:
- Increasing age
- A personal history of breast cancer
- Previous history of radiation to the chest area
- A first-degree relative with breast cancer (for example, mother, sister, daughter, especially in pre-menopausal years)
- Early age of onset of menses
- Late age of first pregnancy
Moffitt's Genetic Counseling and Testing Service can help women with one or more of these risk factors better understand their risk and what options they have to reduce their risk.