More info on the usefulness of mammogerams:

[SheilaT]

1. One of the unexamined issues here

and in many other areas of health care, is that we are not all exactly alike, and those difference can lead to illness in one person but not in another, a bad reaction to a medication in one and a complete cure in another. And so on.

I do realize that for the most part the best we can do is go by what works -- or doesn't work -- for most. And we are moving in the direction of figuring out where an individual's DNA is a factor.