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Benefits of annual mammography screening questioned

KEY POINT

A 25-year follow-up study including nearly 90,000 Canadian women concluded that annual mammography screening in women aged 40 to 59 years did not reduce breast cancer mortality compared with breast physical examination or usual care and resulted in overdiagnosis of breast cancer.  

SOURCES

Bleyer A et al. Effect of three decades of screening mammography on breast-cancer incidence. N Engl J Med. 2012;367:1998–2005. 

Miller AB et al. Twenty-five year follow-up for breast cancer incidence and mortality of the Canadian National Breast Screening Study: randomised screening trial. BMJ. 2014;[Epub ahead of print]. 

Kalager M et al. Too much mamography [editorial]. BMJ. 2014;[Epub ahead of print].