Triple negative breast cancer (TNBC) lacks three important hormone receptors (ER, PR and HER2) and is responsible for 20% of all cases of breast cancer.3, 4, 5, 6 Of the intrinsic subtypes of breast cancer, TNBC is considered the most lethal subtype due to its clinically aggressive behavior and the absence of targeted therapies.3 This evidence concerns the gene NR4A1 and breast carcinoma.