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Article History

Received: 2 February 2025

Accepted: 15 August 2025

First Online: 8 September 2025

Declarations

:

: The study was approved by the Swedish Ethical Review Authority (Dnr. 2021-05879-01). Since the study investigates a small/minimal addition to the routine clinical care at our department of clinical genetics, we applied for and were granted permission to perform the study on stored samples, without renewed informed consent from participants. The approval is valid for patients that have applied for, been offered, and accepted clinical genetical evaluation for hereditary breast cancer in clinical healthcare. Since the aim of the study is completely in line with the clinical investigation, the study poses minimal or no additional risk on the research subjects in addition to the risks from the clinical genetic evaluation. We are only allowed to publish anonymised results and cannot share individual level results. The result of the study will not be reported back to patients unless, in the future, this novel approach is recommended as clinical routine care for women with familial breast cancer in Sweden.

: Not applicable.

: The authors declare no competing interests.