Regarding tumor characteristics, black women had a significantly higher prevalence of grade 3 tumors (30% vs. 12.8%, p=0.005), triple-negative breast cancer (TNBC) (31.7% vs. 11.5%, p<0.001) and lower rates of hormone receptor-positive tumors (58.3% vs. 82.4%, p<0.001). This evidence concerns the gene NR4A1 and triple-negative breast carcinoma.