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The Capital Region of Denmark - a part of Copenhagen University Hospital
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Breast cancer survivors' risk of interval cancers and false positive results in organized mammography screening

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BACKGROUND: Breast cancer survivors are increasing followed for new breast cancers / recurrences by mammography screening only. We aimed at assessing how often breast cancer survivors get a false positive or false negative result at mammography screening.

METHODS: All mammography screenings performed between 2007 and 2017 in the Danish national mammography screening programme were included. Screenings in women with a breast cancer diagnosis prior to invitation were included in the "breast cancer survivors" group, while remaining screenings were included in the "no previous breast cancer" group. We compared the proportion of false positive screenings and the proportion of breast cancers detected at screening among breast cancer survivors and women without previous breast cancer. The analyses were further stratified according to whether the women had a diagnostic breast imaging in the 21 months prior to the screening.

RESULTS: At initial screenings, breast cancer survivors had a significant lower false positive risk than other women, while the risk was similar at subsequent screenings. Breast cancer survivors had a significant lower proportion of breast cancers detected at screening compared to other women. This was true both for women who had a diagnostic breast imaging in the 21 months prior to screening and those who did not.

CONCLUSION: This study shows that breast cancers survivors have a smaller amount of their new breast cancers detected at mammography screening, when compare to the amount of new breast cancers detected at mammography screening among women without previous breast cancer. The lower sensitivity does not seem to be due to different behavior among breast cancer survivors.

Original languageEnglish
JournalCancer Medicine
Volume9
Issue number16
Pages (from-to)6042-6050
Number of pages9
ISSN2045-7634
DOIs
Publication statusPublished - Aug 2020

ID: 61865530