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Mammography detects more small cancers but results in overdiagnosis, researchers warn

BMJ 2015; 351 doi: https://doi.org/10.1136/bmj.h3661 (Published 07 July 2015) Cite this as: BMJ 2015;351:h3661
  1. Jacqui Wise
  1. 1London

Screening mammography results in overdiagnosis, researchers have warned, as more small cancers are detected but there is no corresponding decline in the detection of larger cancers and no significant change in deaths from breast cancer.

An ecological study published in JAMA Internal Medicine1 examined cancer registry data on 16 million women aged 40 and over who lived in 547 US counties …

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