from mother jones: http://www.motherjones.com/mojoblog/...breast_ca.html
lower breast cancer rates may not mean less cancer
according to a report
released today by the cdc, fully 1.1 million fewer women aged 40 and over had mammograms last year than in 2000. this decline might explain, in part, the recent drop in breast cancer rates in the u.s., meaning rates might not actually be going down. fewer diagnoses does not mean fewer cases, just fewer known
cases. so, while we have seen detection rates decrease, deaths from breast cancer could increase, the report says.