Frugtniet B, Morgan S, Murray A, Palmer-Smith S, White R, Jones R, Hanna L, Fuller C, Hudson E, Mullard A, Quinton AE. The detection of germline and somatic BRCA1/2 genetic variants through parallel testing of patients with high-grade serous ovarian cancer: a national retrospective audit.
BJOG 2021;
129:433-442. [PMID:
34657373 PMCID:
PMC9298909 DOI:
10.1111/1471-0528.16975]
[Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 08/11/2021] [Accepted: 09/12/2021] [Indexed: 12/05/2022]
Abstract
Objective
To determine the frequency of germline and somatic pathogenic BRCA1 and BRCA2 variants in patients with high‐grade serous ovarian cancer tested by next‐generation sequencing (NGS), with the aim of defining the best strategy to be implemented in future routine testing.
Design
National retrospective audit.
Setting
The All Wales Medical Genomics Service (AWMGS).
Population
Patients with high‐grade serous ovarian/fallopian tube/peritoneal cancer referred by oncologists to the AWMGS between February 2015 and February 2021 for germline and/or tumour testing of the BRCA1 and BRCA2 genes by NGS.
Methods
Analysis of NGS data from germline and/or tumour testing.
Main outcome measures
Frequency of BRCA1 and BRCA2 pathogenic variants.
Results
The overall observed germline/somatic pathogenic variant detection rate was 11.6% in the 844 patients included in this study, with a 9.2% (73/791) germline pathogenic variant detection rate. Parallel tumour and germline testing was carried out for 169 patients and the overall pathogenic variant detection rate for this cohort was 14.8%, with 6.5% (11/169) shown to have a somatic pathogenic variant. Two BRCA1 dosage variants were found during germline screens, representing 2.0% (2/98) of patients with a pathogenic variant that would have been missed through tumour testing alone.
Conclusions
Parallel germline and tumour BRCA1 and BRCA2 testing maximises the detection of pathogenic variants in patients with high‐grade serous ovarian cancer.
Tweetable abstract
Parallel germline and tumour testing maximises BRCA pathogenic variant detection in ovarian cancer.
Parallel germline and tumour testing maximises BRCA pathogenic variant detection in ovarian cancer.
Linked article This article is commented on by C Gourley, p. 443 in this issue. To view this mini commentary visit https://doi.org/10.1111/1471-0528.16978.
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