Can sex cause breast cancer and will the cervical cancer vaccine offer protection against breast cancer? The human papilloma virus (HPV) known to increase cervical cancer risk might also be responsible for increasing breast cancer risk, according to a small study conducted by University of New South Wales researchers. HPV was discovered in the DNA of breast cancer tumors in almost half of the 50 women who participated in the study.

Researchers went on to indicate that women affected by HPV were approximately eight years younger at the time of breast cancer diagnosis than women who were not affected by HPV. They went on to speculate that HPV is not only spread through sexual activity but can be spread while bathing as the virus can be transferred from the genital area to the breasts.

Professor James Lawson of the University of New South Wales explained that "We know that the virus explodes out of the cell and is spread by touch, so it's fairly obvious that it could be spread by sexual activity to the breast, you could also argue that it would be spread by washing and bathing."

Because the study was a small one, Australia's National Breast Cancer Centre director Dr. Helen Zorbas is hesitant to accept the study as conclusive in showing a link between HPV and breast cancer. "There are a lot of hypotheses into what may cause breast cancer and it's important that we do research to try to investigate them. But a study of 50 cases is very small."