K. Claes PhD, H. Denys MD, PhD, M. Huizing MD, PhD, I. Vergote MD, PhD, F. Kridelka MD, PhD, J. De Grève MD, PhD, V. Bours MD, PhD, On behalf of the BRCA Testing Working Group.
With the aim to optimally position poly-(adenosine diphosphate-ribose) polymerase inhibitors in the treatment of ovarian cancer, a panel of Belgian Experts came to a national multidisciplinary consensus: (i) germline BRCA1/2 testing should be indicated for all women with high-grade serous epithelial ovarian cancer, who are in good general condition (i.e. eligible for systemic treatment with low toxicity); BRCA1/2 mutation detection ratios being about 15–20% in this group; (ii) as the finding of a BRCA1/2 germline mutation has therapeutic implications in ovarian cancer patients, the request for therapy-orienting testing should be made as soon as possible during the course of first-line treatment. Pre-test genetic counselling is important because positive testing has implications for both the patients and their relatives, and the nature of the discussions depends on whether they take place in a therapeutic or familial context. The organisation of consultations should be coordinated in a collaborative effort between clinical geneticists, and gynaecological and medical oncologists, keeping in mind that ‘fast-track’ pre-test genetic counselling and short turnaround times are required for patients for whom the test results will have a therapeutic impact. Offering germline BRCA1/2 testing to all patients with high-grade serous epithelial ovarian cancer who are eligible for systemic treatment with low toxicity will lead to a limited increase in the number of patients eligible for this test in Belgium.