Breast cancer pathology and stage are better predicted by risk stratification models that include mammographic density and common genetic variants
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Authors
Evans, D Gareth RHarkness, EF
Brentnall, AR
van Veen, EM
Astley, SM
Byers, H
Sampson, S
Southworth, J
Stavrinos, P
Howell, Sacha J
Maxwell, Anthony J
Howell, Anthony
Newman, WG
Cuzick, J
Affiliation
Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, University of Manchester, MAHSC, Manchester, UK.Issue Date
2019
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PURPOSE: To improve breast cancer risk stratification to enable more targeted early detection/prevention strategies that will better balance risks and benefits of population screening programmes. METHODS: 9362 of 57,902 women in the Predicting-Risk-Of-Cancer-At-Screening (PROCAS) study who were unaffected by breast cancer at study entry and provided DNA for a polygenic risk score (PRS). The PRS was analysed alongside mammographic density (density-residual-DR) and standard risk factors (Tyrer-Cuzick-model) to assess future risk of breast cancer based on tumour stage receptor expression and pathology. RESULTS: 195 prospective incident breast cancers had a prediction based on TC/DR/PRS which was informative for subsequent breast cancer overall [IQ-OR 2.25 (95% CI 1.89-2.68)] with excellent calibration-(0.99). The model performed particularly well in predicting higher stage stage 2+ IQ-OR 2.69 (95% CI 2.02-3.60) and ER?+?BCs (IQ-OR 2.36 (95% CI 1.93-2.89)). DR was most predictive for HER2+ and stage 2+ cancers but did not discriminate as well between poor and extremely good prognosis BC as either Tyrer-Cuzick or PRS. In contrast, PRS gave the highest OR for incident stage 2+ cancers, [IQR-OR 1.79 (95% CI 1.30-2.46)]. CONCLUSIONS: A combined approach using Tyrer-Cuzick/DR/PRS provides accurate risk stratification, particularly for poor prognosis cancers. This provides support for reducing the screening interval in high-risk women and increasing the screening interval in low-risk women defined by this model. KEYWORDS: Breast cancer; Early detection; Mammographic density; Pathology; Polygenic risk score; SNPsCitation
Evans DGR, Harkness EF, Brentnall AR, van Veen EM, Astley SM, Byers H, et al. Breast cancer pathology and stage are better predicted by risk stratification models that include mammographic density and common genetic variants. Breast Cancer Res Treat. 2019 Apr 2.Journal
Breast Cancer Research and TreatmentDOI
10.1007/s10549-019-05210-2PubMed ID
30941651Additional Links
https://dx.doi.org/10.1007/s10549-019-05210-2Type
ArticleLanguage
enae974a485f413a2113503eed53cd6c53
10.1007/s10549-019-05210-2
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