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Review
. 2019 Mar 22:11:2321-2337.
doi: 10.2147/CMAR.S189627. eCollection 2019.

A systematic review of international guidelines and recommendations for the genetic screening, diagnosis, genetic counseling, and treatment of BRCA-mutated breast cancer

Affiliations
Review

A systematic review of international guidelines and recommendations for the genetic screening, diagnosis, genetic counseling, and treatment of BRCA-mutated breast cancer

Carol Forbes et al. Cancer Manag Res. .

Abstract

Purpose: To conduct a systematic review of international guidelines on screening and management of patients with BRCA-mutated breast cancer (BC).

Methods: Major electronic databases (MEDLINE and Embase; N=8) and gray literature sources were searched (January 2007 to February 2018). Latest guideline recommendations on genetic screening, counseling, and BC treatment of BRCA mutation carriers were summarized. Guidelines specific to germline BRCA (gBRCA) mutation were captured where available.

Results: A total of 3,775 records were retrieved and 32 guidelines were included; Europe (n=16), USA (n=11), Canada (n=3), Australia (n=1), and Japan (n=1) were included. Across and within guidelines, genetic counseling was recommended at multiple points in the care pathway, though the format was not always clearly defined. US guidelines emphasized that BRCA mutation testing should occur after specialized genetic counseling; other European guidelines are less prescriptive. BRCA testing eligibility criteria differed, with some guidelines being less restrictive; US National Comprehensive Cancer Network (NCCN) BC guidelines specified that HER2-negative BC patients eligible for single-agent therapy are eligible for gBRCA testing. Fast-track BRCA testing is recommended in the Netherlands if treatment choice will affect survival, but in the UK only as part of clinical trials. More recent European (European School of Oncology-European Society for Medical Oncology 3rd International Consensus Guidelines for Breast Cancer in Young Women 2017, Arbeitsgemeinschaft Gynäkologische Onkologie 2017 in Germany) and US (NCCN) guidelines have updated recommendations regarding gBRCA-targeted poly(ADP-ribose) polymerase (PARP) inhibitor therapy in BC.

Conclusion: Regional and organizational guidelines differ for genetic screening, counseling, and treatment of patients with BRCA-mutated BC. Guideline harmonization would optimize identification and management of these patients.

Keywords: BRCA1; BRCA2; PARP inhibitor; chemotherapy; guidelines; systematic review.

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Conflict of interest statement

Disclosure CF, DF, and SdK are employees of Kleijnen Systematic Reviews Ltd. who were paid consultants to Pfizer Inc. in connection with the development of this manuscript. RGWQ is an employee of Pfizer Inc. The authors report no other conflicts of interest with respect to this work.

Figures

Figure 1
Figure 1
PRISMA flow chart. Notes: *Unobtainable paper – not available through online sources or British Library. This paper is published in 2012 and only has two authors, with no mention of a recognized group or guideline/cancer organization. The title suggests it relates to breast cancer in general (no specific mention of BRCA in the keywords, title, or abstract). At full paper screening to reduce the risk of missing relevant BRCA recommendations, we have screened all general breast cancer guidelines. However, it is unlikely that this paper will be relevant and so its “unobtainable” status is unlikely to affect the findings of the review.

References

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