http://www.naturalnews.com/038099_mammograms_false_positives_overdiagnosis.html
Also check: http://www.nejm.org/doi/full/10.1056/NEJMoa1206809?query=featured_home
"...we estimated that breast cancer was overdiagnosed (i.e., tumors were detected on screening that would never have led to clinical symptoms) in 1.3 million U.S. women in the past 30 years. We estimated that in 2008, breast cancer was overdiagnosed in more than 70,000 women; this accounted for 31% of all breast cancers diagnosed."
Also check: http://www.nejm.org/doi/full/10.1056/NEJMoa1206809?query=featured_home
"...we estimated that breast cancer was overdiagnosed (i.e., tumors were detected on screening that would never have led to clinical symptoms) in 1.3 million U.S. women in the past 30 years. We estimated that in 2008, breast cancer was overdiagnosed in more than 70,000 women; this accounted for 31% of all breast cancers diagnosed."
