- What is breast cancer
- The importance of finding breast cancer early
- What are the risk factors for breast cancer?
- Breast cancer risk factors you cannot change
- Lifestyle-related risk factors for breast cancer
- Factors with unclear effects on breast cancer risk
- Disproven or controversial breast cancer risk factors
- Can breast cancer be prevented?
- Signs and symptoms of breast cancer
- American Cancer Society recommendations for early breast cancer detection in women without breast symptoms
- Breast magnetic resonance imaging
- Clinical breast exam
- Breast awareness and self-exam
- Breast ultrasound
- Other breast cancer screening tests
- Paying for breast cancer screening
- To learn more about breast cancer early detection
- References: Breast cancer early detection
Disproven or controversial breast cancer risk factors
Internet and e-mail rumors have suggested that chemicals in underarm antiperspirants are absorbed through the skin, interfere with lymph circulation, and cause toxins to build up in the breast, eventually leading to breast cancer.
Based on the available evidence (including what we know about how the body works), there is little if any reason to believe that antiperspirants increase the risk of breast cancer. For more information, see our document Antiperspirants and Breast Cancer Risk.
Internet and e-mail rumors and at least one book have suggested that bras cause breast cancer by obstructing lymph flow. There is no good scientific or clinical basis for this claim, and a recent study of more than 1,500 women found no association of bra use with breast cancer risk.
Several studies have provided very strong data that neither induced abortions nor spontaneous abortions (miscarriages) have an overall effect on the risk of breast cancer. For more detailed information, see our document Is Abortion Linked to Breast Cancer?
Several studies have found that breast implants do not increase the risk of breast cancer, although silicone breast implants can cause scar tissue to form in the breast. Implants make it harder to see breast tissue on standard mammograms, but additional x-ray pictures called implant displacement views can be used to examine the breast tissue more completely.
Breast implants may be linked to a rare type of lymphoma called anaplastic large cell lymphoma. This lymphoma has rarely been found in the breast tissue around the implants. So far, though, there are too few cases to know if the risk of this lymphoma is really higher in women with implants.
Last Medical Review: 09/10/2014
Last Revised: 04/09/2015