Most aggressive forms of prostate cancer may be caused by virus

GUARDIAN: Scientists working on prostate cancer have found evidence that the most aggressive forms of the disease may be caused by a virus. READ MORE>

A team of US researchers found traces of virus inside fast-growing prostate tumours, suggesting it could play a role in the development of the cancer.

The virus, known as XMRV (xenotropic murine leukaemia virus-related virus), is known to cause leukaemia and tumours in animals, but has never been proved to cause cancer in humans.