The Institute of Medicine (IOM) reviewed data about possible environmental risks for developing breast cancer. They felt that pesticides beauty products household chemicals and plastics might or might not be risk factors for breasts cancer. They did agree that medical x-rays were a clear risk for developing breast cancer. They recommended that MDs avoid ordering unnecessary biomedical imaging.
The probem is that these tests provide important information that can often help physicians make the right diagnosis. However we also know that these tests are often overdone and could be avoided.