The Wire

One in four men will develop prostate cancer in their lifetime, but some may be too slow-growing to ever actually pose a threat to healthy men. This means that testing for prostate cancer can be tricky because some men may have a false-positive reading.

This could result in harmful overtreatment.But a new prostate screening test has been developed at the University of Columbia to distinguish between the genes that actually pose a threat and the genes that are harmless.