Risk of Late-Onset Breast Cancer in Genetically Predisposed Women

Author:

Boddicker Nicholas J.1ORCID,Hu Chunling1ORCID,Weitzel Jeffrey N.2ORCID,Kraft Peter3ORCID,Nathanson Katherine L.45ORCID,Goldgar David E.6ORCID,Na Jie1ORCID,Huang Hongyan3,Gnanaolivu Rohan D.1,Larson Nicole1,Yussuf Amal7ORCID,Yao Song8ORCID,Vachon Celine M.1ORCID,Trentham-Dietz Amy9ORCID,Teras Lauren10ORCID,Taylor Jack A.11ORCID,Scott Christopher E.1,Sandler Dale P.11ORCID,Pesaran Tina7ORCID,Patel Alpa V.10,Palmer Julie R.12ORCID,Ong Irene M.9ORCID,Olson Janet E.1,O'Brien Katie11,Neuhausen Susan2ORCID,Martinez Elena2ORCID,Ma Huiyan2,Lindstrom Sara13,Le Marchand Loic14,Kooperberg Charles15,Karam Rachid7ORCID,Hunter David J.16,Hodge James M.10ORCID,Haiman Christopher17,Gaudet Mia M.10ORCID,Gao Chi3ORCID,LaDuca Holly7ORCID,Lacey James V.2,Dolinsky Jill S.7ORCID,Chao Elizabeth7,Carter Brian D.10,Burnside Elizabeth S.9ORCID,Bertrand Kimberly A.12ORCID,Bernstein Leslie2ORCID,Auer Paul W.18,Ambrosone Christine8ORCID,Yadav Siddhartha1ORCID,Hart Steven N.1ORCID,Polley Eric C.1ORCID,Domchek Susan M.45ORCID,Couch Fergus J.1ORCID

Affiliation:

1. Mayo Clinic, Rochester, MN

2. Beckman Research Institute of City of Hope, Duarte, CA

3. Harvard University T.H. Chan School of Public Health, Boston, MA

4. Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA

5. Basser Center for BRCA, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA

6. University of Utah, Salt Lake City, UT

7. Ambry Genetics, Aliso Viejo, CA

8. Roswell Park Comprehensive Cancer Center, Buffalo, NY

9. University of Wisconsin-Madison, Madison, WI

10. Behavioral and Epidemiology Research Group, American Cancer Society, Atlanta, GA

11. NIEHS, Durham, NC

12. Slone Epidemiology Center at Boston University, Boston, MA

13. Department of Epidemiology, University of Washington, Seattle, WA

14. Epidemiology Program, University of Hawaii Cancer Center, Honolulu, HI

15. Fred Hutchinson Cancer Research Center, Seattle, WA

16. University of Oxford, Oxford, United Kingdom

17. Keck School of Medicine, University of Southern California, Los Angeles, CA

18. UWM Joseph J. Zilber School of Public Health, Milwaukee, WI

Abstract

PURPOSE The prevalence of germline pathogenic variants (PVs) in established breast cancer predisposition genes in women in the general population over age 65 years is not well-defined. However, testing guidelines suggest that women diagnosed with breast cancer over age 65 years might have < 2.5% likelihood of a PV in a high-penetrance gene. This study aimed to establish the frequency of PVs and remaining risks of breast cancer for each gene in women over age 65 years. METHODS A total of 26,707 women over age 65 years from population-based studies (51.5% with breast cancer and 48.5% unaffected) were tested for PVs in germline predisposition gene. Frequencies of PVs and associations between PVs in each gene and breast cancer were assessed, and remaining lifetime breast cancer risks were estimated for non-Hispanic White women with PVs. RESULTS The frequency of PVs in predisposition genes was 3.18% for women with breast cancer and 1.48% for unaffected women over age 65 years. PVs in BRCA1, BRCA2, and PALB2 were found in 3.42% of women diagnosed with estrogen receptor (ER)–negative, 1.0% with ER-positive, and 3.01% with triple-negative breast cancer. Frequencies of PVs were lower among women with no first-degree relatives with breast cancer. PVs in CHEK2, PALB2, BRCA2, and BRCA1 were associated with increased risks (odds ratio = 2.9-4.0) of breast cancer. Remaining lifetime risks of breast cancer were ≥ 15% for those with PVs in BRCA1, BRCA2, and PALB2. CONCLUSION This study suggests that all women diagnosed with triple-negative breast cancer or ER-negative breast cancer should receive genetic testing and that women over age 65 years with BRCA1 and BRCA2 PVs and perhaps with PALB2 and CHEK2 PVs should be considered for magnetic resonance imaging screening.

Publisher

American Society of Clinical Oncology (ASCO)

Subject

Cancer Research,Oncology

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