More Findings, More Questions About Value Of Mammograms

MELISSA BLOCK, HOST:

There's new evidence out today that's raising questions about whether women in their 40's and 50's should routinely undergo mammography to detect breast cancer. A new analysis of a big Canadian study found no evidence that regular mammograms save lives. The study even suggests that for many women, regular breast X-rays may do more harm than good.

NPR's Rob Stein joins us now to talk about this report.