Annals of Surgical Oncology

, Volume 20, Issue 10, pp 3254–3258

Prevalence of BRCA Mutations Among Women with Triple-Negative Breast Cancer (TNBC) in a Genetic Counseling Cohort

Authors

    • Department of SurgeryDuke University
    • Duke Cancer Institute
  • Adam Buchanan
    • Duke Cancer Institute
  • Wendy Lorizio
    • Department of SurgeryDuke University
  • Keelia Rhoads
    • Duke Cancer Institute
  • Salina Chan
    • University of California San Francisco Comprehensive Cancer Center
  • Tracey Leedom
    • Duke Cancer Institute
  • Robin King
    • Duke Cancer Institute
  • Jane McLennan
    • University of California San Francisco Comprehensive Cancer Center
  • Beth Crawford
    • University of California San Francisco Comprehensive Cancer Center
  • P. Kelly Marcom
    • Department of MedicineDuke University
    • Duke Cancer Institute
  • E. Shelley Hwang
    • Department of SurgeryDuke University
    • Duke Cancer Institute
Breast Oncology

DOI: 10.1245/s10434-013-3205-1

Cite this article as:
Greenup, R., Buchanan, A., Lorizio, W. et al. Ann Surg Oncol (2013) 20: 3254. doi:10.1245/s10434-013-3205-1

Abstract

Background

Revised NCCN guidelines recommend that women ≤60 years with triple-negative breast cancer (TNBC) be referred for consideration of genetic counseling. Small, homogeneous samples have limited evaluation of BRCA mutation prevalence among different ethnicities affected by TNBC subtype. We sought to determine whether the prevalence of BRCA mutations within a TNBC cohort differs by demographic factors.

Methods

We performed a retrospective review of patients with TNBC referred for genetic counseling at two academic Hereditary Cancer Clinics between 2000 and 2012. Demographic data were collected, including age at diagnosis and race/ethnicity. Race was categorized as African American (AA), Ashkenazi Jewish (AJ), Asian, Caucasian, Hispanic, or other. Primary outcome was BRCA mutation status, analyzed by race/ethnicity and age at diagnosis.

Results

A total of 469 patients with TNBC who underwent testing for BRCA genetic mutations were identified, of which 450 patients had evaluable BRCA testing results; 139 (30.8 %) had confirmed BRCA1 (n = 106) or BRCA2 (n = 32) mutations. BRCA mutation prevalence differed by ethnicity and race: AA (20.4 %), AJ (50 %), Asian (28.5 %), Caucasian (33.3 %), and Hispanic (20 %). The prevalence of genetic mutations also differed by age at diagnosis: <40 years (43.8 %), 40–49 years (27.4 %), 50–59 years (25.3 %), 60–69 years (12.5 %), and >70 years (16.6 %).

Conclusions

The prevalence of genetic mutations among women with TNBC referred for genetic counseling is high and differs significantly by ethnicity/race and age. This data helps to refine mutation risk estimates among women with TNBC, allowing for more personalized genetic counseling potentially aiding in improved patient decision-making.

Copyright information

© Society of Surgical Oncology 2013