This Writer Traces the Push Towards Having

mammograms at earlier ages, even though there are many, many false positives with younger women and the fact deaths from breast cancer have hardly budged:

Critics of this week’s recommendations have poked holes in the Preventive Services Task Force’s data analysis, have warned against basing present practice guidelines on the older imaging technology used in the studies, and have called for still more studies to be done. They generally sidestep the question of whether the very small numbers of lives potentially saved by screening younger women outweigh the health, psychological and financial costs of overdiagnosis.

You need to screen 1,900 women in their 40s for 10 years in order to prevent one death from breast cancer, and in the process you will have generated more than 1,000 false-positive screens and all the overtreatment they entail. This doesn’t make sense. We could do more research and hold more consensus conferences. I suspect it would confirm the data we already have. But history suggests it would never be enough to convince many people that we are screening too much.