Triple negative breast cancer presentation in Afro-Caribbean women in New York City.

e18726 Background: In the United States, triple negative breast cancer (TNBC) accounts for 10-15% of all breast cancers. It also has a higher incidence and worse prognosis in black women. There is paucity of information on the incidence and presentation of breast cancer in black women from the Caribbean. The clinical and pathologic profile of TNBC in this immigrant underrepresented patient group is described here. Methods: This is a retrospective study performed at Kings County Hospital (KCH), a safety net hospital in Central Brooklyn, New York City with a predominantly Afro-Caribbean patient population. Data from patients diagnosed with breast cancer from 2015-2018 were collected from the institution’s tumor registry and the clinical and pathologic data of these patients were collected and analyzed with descriptive statistics and chi square testing. Results: Of the total 299 female patients with a breast cancer diagnosis, 60 patients (20%) had TNBC with median age 57 and Nottingham grade 3 in 90% (54) of the patients. At presentation, 43% (26) presented with localized disease, 55% (33) with lymph node involvement (regional), and 2% (1) with distant metastasis. When stratified by menopausal status, 46 patients (77 %) were post-menopausal and remainder pre-menopausal. Premenopausal women presented with higher rates of regional disease at 64% with compared to 50% in the postmenopausal women (p = 0.5444). BMI was similar in both groups (p = 0.9879). Of the 37 patients with documented country of origin, 84% (31) were from the Caribbean, and 27% of these patients identified as medical tourists from the Caribbean. 25% (15) of all patients reported 1 st or 2 nd degree relative with breast cancer and 18% (11) reported a first degree relative with malignancy other that breast cancer. 100% of patients younger than 44 years reported a family history of cancer. Genetic testing information was unavailable to these patients. Of the twenty patients (33%) that received neoadjuvant chemotherapy with standard treatment, two achieved complete response, 15 partial response, and 3 without response to treatment. Conclusions: In our study of African-Caribbean patients with breast cancer, the incidence of TNBC was high at 20% with most presenting with high-grade tumors, regional lymph node involvement, and young age at diagnosis. Notably this represents a high-risk cohort with significant family history of breast and other cancers suggestive of inherited or familial cancers. Response to standard neoadjuvant chemotherapy was less than expected, encouraging the need to consider neoadjuvant immunotherapy in these patients.