AI Article Synopsis
- The study aimed to explore how changes in breast density during menopause affect breast cancer risk among women over 30.
- It tracked women who had regular mammograms at Samsung Medical Center, finding that 45 out of nearly 19,000 person-years were diagnosed with breast cancer, particularly noting that younger women with extremely dense breasts faced higher cancer rates.
- The conclusion highlighted that Korean women with persistently extremely dense breasts from premenopause to postmenopause have double the risk of developing breast cancer, suggesting those at risk should have more frequent screenings.
Article Abstract
Background: The aim of this study was to investigate the relationship between changes in breast density during menopause and breast cancer risk.
Methods: This study was a retrospective, longitudinal cohort study for women over 30 years of age who had undergone breast mammography serially at baseline and postmenopause during regular health checkups at Samsung Medical Center. None of the participants had been diagnosed with breast cancer at baseline. Mammographic breast density was measured using the American College of Radiology Breast Imaging Reporting and Data System.
Results: During 18,615 person-years of follow-up (median follow-up 4.8 years; interquartile range 2.8-7.5 years), 45 participants were diagnosed with breast cancer. The prevalence of dense breasts was higher in those who were younger, underweight, had low parity or using contraceptives. The cumulative incidence of breast cancer increased 4 years after menopause in participants, and the consistently extremely dense group had a significantly higher cumulative incidence (CI) of breast cancer compared with other groups [CI of extremely dense vs. others (incidence rate per 100,000 person-years): 375 vs. 203, < 0.01].
Conclusion: Korean women whose breast density was extremely dense before menopause and who maintained this density after menopause were at two-fold greater risk of breast cancer.
Prevention Relevance: Extremely dense breast density that is maintained persistently from premenopause to postmenopause increases risk of breast cancer two fold in Korean women. Therefore, women having risk factors should receive mammography frequently and if persistently extremely dense breast had been detected, additional modalities of BC screening could be considered.
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| http://dx.doi.org/10.1158/1940-6207.CAPR-20-0542 | DOI Listing |
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