A study to find out more about the causes of breast cancer (The British Breast Cancer Study BBC-NCRN Cohort)

This study collected information to help find out more about the causes of breast cancer that runs in families.

There are many risk factors associated with breast cancer. Doctors know that if you have a strong family history of breast cancer, there may be a faulty gene that increases your risk. They also know that certain hormones affect your risk.