Breast cancer isn't political. But there's continuing debate in the US medical establishment over the proper way to screen for it -- how to test, how frequentl

Breast cancer isn't political. But there's continuing debate in the US medical establishment over the proper way to screen for it -- how to test, how frequently, at what age range, what constitutes a positive result, and how should the doctor follow up if the test is positive? The recommended answers to these questions seem to change every few years, and the substantiation behind the answers is often inconsistent. The same issues bedevil prostate cancer screening.