Forty-eight women had BC, fifteen of them had non-metastatic ones in both mammary glands (in each individual instance, malignant tumors were histologically different or had a discrepancy in hormone-receptor status, or a time gap was at least 5 years), eight had BC and OC, and two had cancers in both mammary glands and ovarian one. This evidence concerns the gene NR4A1 and breast cancer.