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Risk of breast cancer and changes in mammographic parenchymal patterns over time.

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Affiliations

  • 1. Tampere School of Public Health, University of Tampere, Finland.
      Authors
    • Salminen TM 1
    (1 author)

Acta Oncologica (Stockholm, Sweden), 01 Jan 1998, 37(6):547-551
https://doi.org/10.1080/028418698430241 PMID: 9860312 

Abstract 

The relationship between sequential mammographic parenchymal patterns and breast cancer was estimated and the results were applied to selective screening. In a pilot screening program 4163 Finnish women aged 40-47 years at entry were invited to be screened every second year from 1982 to 1990. Mammographic parenchymal patterns (Wolfe's classification) were recorded at each screening round. The follow-up ended in 1993 and up until that time 68 new breast cancers were diagnosed. The age-adjusted relative risk of breast cancer was 2.5 (95% CI 1.5-4.0) among women with high-risk mammographic parenchymal patterns (P2,DY) at the screenings preceding cancer diagnosis compared with those with low-risk patterns (N1,P1). After further adjustment for body mass index, number of pregnancies and size of the breast, the relative risk increased to 2.8 (95% CI 1.7-4.9). The mammographic parenchymal pattern is an independent risk factor of breast cancer but not strong enough to be used as a criterion for selective screening.

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Read article at publisher's site: https://doi.org/10.1080/028418698430241

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