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Zimovjanova, Martina; Bielcikova, Zuzana; Miskovicova, Michaela; Vocka, Michal; Zimovjanova, Anna; Rybar, Marian; Novotny, Jan; Petruzelka, Lubos
Cancers, 02/2023, Volume: 15, Issue: 4Journal Article
Unnafected female carriers of and pathogenic/likely pathogenic variants (P/LPVs) are at higher risk of breast cancer (BC) and ovarian cancer (OC). In the retrospective single-institution study in the Czech Republic, we analyzed the rate, longitudinal trends, and effectiveness of prophylactic risk-reducing mastectomy (RRM) and risk-reducing salpingo-oophorectomy (RRSO) on the incidence of BC and OC in / carriers diagnosed between years (y) 2000 to 2020. The study included 496 healthy female / carriers. The median follow-up was 6.0 years. RRM was performed in 156 (31.5%, mean age 39.3 y, range 22-61 y) and RRSO in 234 (47.2%, mean age 43.2 y, range 28-64 y) / carriers. A statistically significant increase of RRM (from 12% to 29%) and RRSO (from 31% to 42%) was observed when comparing periods 2005-2012 and 2013-2020 ( < 0.001). BC developed in 15.9% of carriers without RRM vs. 0.6% of carriers after RRM (HR 20.18, 95% CI 2.78- 146.02; < 0.001). OC was diagnosed in 4.3% vs. 0% of carriers without vs. after RRSO (HR not defined due to 0% occurrence in the RRSO group, < 0.001). Study results demonstrate a significant increase in the rate of prophylactic surgeries in healthy carriers after 2013 and the effectiveness of RRM and RRSO on the incidence of BC and OC in these populations.
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