When you have a hammer, every cancer cell looks like a nail

We know that we may be over-treating some breast cancer patients. But why?

I wrote the other day that there's some possibility that screening mammograms lead to overtreatment of breast cancer. I wouldn’t describe it as a broad consensus among researchers, but it’s fairly well established.  And it’s another way in which science does not always drive treatment.

The specific kind of cancer that I have offers the best example of wh…