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Link to original content: https://pubmed.ncbi.nlm.nih.gov/32107557
Ovarian and Breast Cancer Risks Associated With Pathogenic Variants in RAD51C and RAD51D - PubMed Skip to main page content
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. 2020 Dec 14;112(12):1242-1250.
doi: 10.1093/jnci/djaa030.

Ovarian and Breast Cancer Risks Associated With Pathogenic Variants in RAD51C and RAD51D

Xin Yang  1 Honglin Song  1   2 Goska Leslie  1 Christoph Engel  3 Eric Hahnen  4   5 Bernd Auber  6 Judit Horváth  7 Karin Kast  8   9   10 Dieter Niederacher  11 Clare Turnbull  12 Richard Houlston  12 Helen Hanson  12 Chey Loveday  12 Jill S Dolinsky  13 Holly LaDuca  13 Susan J Ramus  14   15   16 Usha Menon  17 Adam N Rosenthal  18 Ian Jacobs  18   19   20 Simon A Gayther  21 Ed Dicks  2 Heli Nevanlinna  22 Kristiina Aittomäki  23 Liisa M Pelttari  22 Hans Ehrencrona  24   25 Åke Borg  26 Anders Kvist  26 Barbara Rivera  27   28 Thomas V O Hansen  29   30 Malene Djursby  30 Andrew Lee  1 Joe Dennis  1 David D Bowtell  31   32 Nadia Traficante  31   32 Orland Diez  33   34 Judith Balmaña  35   36 Stephen B Gruber  37 Georgia Chenevix-Trench  38 kConFab Investigators  39 Allan Jensen  40 Susanne K Kjær  40   41 Estrid Høgdall  40   42 Laurent Castéra  43 Judy Garber  44 Ramunas Janavicius  45   46 Ana Osorio  47   48 Lisa Golmard  49 Ana Vega  47   50   51 Fergus J Couch  52 Mark Robson  53 Jacek Gronwald  54 Susan M Domchek  55 Julie O Culver  56 Miguel de la Hoya  57 Douglas F Easton  1   2 William D Foulkes  5   8 Marc Tischkowitz  5   9 Alfons Meindl  58 Rita K Schmutzler  4   5   59 Paul D P Pharoah  1   2 Antonis C Antoniou  1
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Ovarian and Breast Cancer Risks Associated With Pathogenic Variants in RAD51C and RAD51D

Xin Yang et al. J Natl Cancer Inst. .

Abstract

Background: The purpose of this study was to estimate precise age-specific tubo-ovarian carcinoma (TOC) and breast cancer (BC) risks for carriers of pathogenic variants in RAD51C and RAD51D.

Methods: We analyzed data from 6178 families, 125 with pathogenic variants in RAD51C, and 6690 families, 60 with pathogenic variants in RAD51D. TOC and BC relative and cumulative risks were estimated using complex segregation analysis to model the cancer inheritance patterns in families while adjusting for the mode of ascertainment of each family. All statistical tests were two-sided.

Results: Pathogenic variants in both RAD51C and RAD51D were associated with TOC (RAD51C: relative risk [RR] = 7.55, 95% confidence interval [CI] = 5.60 to 10.19; P = 5 × 10-40; RAD51D: RR = 7.60, 95% CI = 5.61 to 10.30; P = 5 × 10-39) and BC (RAD51C: RR = 1.99, 95% CI = 1.39 to 2.85; P = 1.55 × 10-4; RAD51D: RR = 1.83, 95% CI = 1.24 to 2.72; P = .002). For both RAD51C and RAD51D, there was a suggestion that the TOC relative risks increased with age until around age 60 years and decreased thereafter. The estimated cumulative risks of developing TOC to age 80 years were 11% (95% CI = 6% to 21%) for RAD51C and 13% (95% CI = 7% to 23%) for RAD51D pathogenic variant carriers. The estimated cumulative risks of developing BC to 80 years were 21% (95% CI = 15% to 29%) for RAD51C and 20% (95% CI = 14% to 28%) for RAD51D pathogenic variant carriers. Both TOC and BC risks for RAD51C and RAD51D pathogenic variant carriers varied by cancer family history and could be as high as 32-36% for TOC, for carriers with two first-degree relatives diagnosed with TOC, or 44-46% for BC, for carriers with two first-degree relatives diagnosed with BC.

Conclusions: These estimates will facilitate the genetic counseling of RAD51C and RAD51D pathogenic variant carriers and justify the incorporation of RAD51C and RAD51D into cancer risk prediction models.

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Figures

Figure 1.
Figure 1.
Estimated age-specific tubo-ovarian carcinoma and breast cancer cumulative risks in RAD51C and RAD51D pathogenic variant carriers. The shaded areas correspond to the 95% confidence intervals.
Figure 2.
Figure 2.
Estimated TOC and BC cumulative risks for RAD51C and RAD51D pathogenic variant carriers by cancer family history. BC = breast cancer; TOC = tubo-ovarian carcinoma.

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