Purpose: Identification of women with hereditary forms of cancer allows for use of precision medicine approaches to improve survival. Non-Hispanic Black (NHB) women in the US general population are less likely to undergo genetic testing or utilize risk-reducing strategies. Whether these disparities exist within the equal-access military healthcare system of the Department of Defense is not known. Methods: Genetic test information and surgical procedures were extracted for all NHB and Non-Hispanic Whites (NHW) with invasive breast cancer who were diagnosed and treated at the Murtha Cancer Center at Walter Reed National Military Medical Center and enrolled in the Clinical Breast Care Project. National Comprehensive Cancer Network criteria from the year of diagnosis were assessed for all patients. Data were analyzed using chi-square analysis with p<0.05 defining significance. Results: NHB were significantly (p=0.009) more likely to meet criteria for genetic testing compared to NHW, however, test uptake did not differ significantly between populations (p=0.292). Pathogenic variant frequency (p=0.597), prophylactic mastectomy (p=0.915) and oophorectomy (p=0.076) did not differ significantly between populations. Conclusion: These data demonstrate that when barriers, such as cost and lack of insurance barriers were removed, NHB were as willing to pursue testing and risk-reducing strategies as their NHW counterparts. Increasing the availability of testing and clinical management for NHB with hereditary forms of cancer may help reduce disparate survival seen in the US general population. The contents of this publication are the sole responsibility of the author(s) and do not necessarily reflect the views, opinions or policies of Uniformed Services University of the Health Sciences (USUHS), The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., the Department of Defense (DoD) or the Departments of the Army, Navy, or Air Force. Mention of trade names, commercial products, or organizations does not imply endorsement by the U.S. Government.

Citation Format: Rachel Ellsworth, Ashlee Vargason, Clesson Turner, Craig Shriver. Genetic testing in non-Hispanic Black women with breast cancer treated within an equal-access healthcare system [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P3-14-04.