Breast cancers can be classified into different types based on the receptors expressed by the cancer cells, which are either hormone receptor-positive cancer cells (expressing estrogen and/or progesterone receptors), HER2/neu-positives (expressing erbB-2 receptors), or triple-negative breast cancer cells (TNBC, lacking the aforementioned receptors) [2]. Here, NR4A1 is linked to cancer.