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45 Background: Little data exist regarding uptake of surgical prophylaxis in the underserved clinical setting. This study describes acceptance of surgical prophylaxis amongst BRCA mutation carriers in a primarily Hispanic (60%) and Asian (15%) medically underserved population. Methods: An IRB-approved retrospective chart review of deleterious or suspected deleterious BRCA mutations carriers extracted clinicopathologic data, surgical history, and family cancer history. Patients younger than the recommended age of prophylaxis, undergoing active therapy, or with metastatic cancer were excluded. Results: Forty-six carriers of known or suspected deleterious BRCA mutations expressed decisions regarding prophylactic bilateral salpingo-oophorectomy and/or mastectomy. Thirty nine women identified themselves as Hispanic, 32 from Mexico. Three women were Asian, 2 African American and 1 Middle Eastern. Forty-two patients were previously affected by cancer, with a mean age at first cancer diagnosis of 42. Four patients were unaffected. Thirty-two women with a previous cancer diagnosis accepted prophylaxis: 11 RRM plus RRSO, 10 RRSO only, 11 RRM only. Three unaffected women underwent RRSO only. None of the unaffected patients chose RRM only. Presence of an affected family member younger than 35 at time of cancer diagnosis correlated with uptake of prophylactic surgery (18 accepted vs. 1 declined; p=0.01). There was a trend towards acceptance of prophylaxis among women with earlier TNM stage that did not reach statistical significance. Conclusions: More than 50% of eligible BRCA mutation carriers in this medically underserved population underwent RRM, RRSO, or both. Young family members affected with cancer positively influenced acceptance of surgical prophylaxis. [Table: see text]