Observational studyActa oncologica (Stockholm, Sweden)2025
Germline BRCA testing in Denmark following invasive breast cancer: Progress since 2000.
Observational study in Acta oncologica (Stockholm, Sweden), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Time trends, uptake, and oncological effects of risk-reducing surgeries in 3067 Danish BRCA1/2 carriers: a population-based study with matched controls.Breast cancer research and treatment · 2025Article
- Timely germline BRCA testing after invasive breast cancer promotes contralateral risk-reducing mastectomy and improves survival: an observational retrospective study.Breast cancer research and treatment · 2025Observational
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10 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
background and purposeDespite advancements in genetic testing and expanded eligibility criteria, underutilisation of germline testing for pathogenic variants in BRCA1 and BRCA2 (BRCA) remains evident among breast cancer (BC) patients. This observational cohort study presents real-world data on BRCA testing within the context of clinical practice challenges, including incomplete family history and under-referral. MATERIAL AND
methodsFrom the Danish Breast Cancer Group (DBCG) clinical database, we included 65,117 females with unilateral stage I-III BC diagnosed in 2000-2017, of whom 9,125 (14%) were BRCA tested. Test results spanned from 1999 to 2021. We evaluated test rates overall and in three diagnosis periods. In logistic regression models, we examined the correlation between a BRCA test and patients' age, residency region, receptor status, and diagnosis period.
resultsTest rates rose most significantly among patients aged under 40 years, increasing from 47% (2000-2005) to 88% (2012-2017), albeit with regional discrepancies. Test timing shifted in recent years, with most results within 6 months of BC diagnosis, primarily among the youngest patients. BRCA test rates were higher for oestrogen receptor-negative/human epidermal growth factor receptor 2-negative BC (25% in 2000-2005 vs. 38% in 2012-2017), and these findings were confirmed in multivariate regression models.
interpretationOur results indicate a critical need for an intensified focus on BRCA testing among BC patients older than 40, where a mainstreamed testing approach might overcome delayed or missed testing. Current DBCG guidelines recommend BRCA testing of all BC patients younger than 50 years, while a general recommendation for older patients is still missing.
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