Furthermore, it was discovered that the expression of BRCA1/2 mRNA in breast cancer tissues was significantly higher than that in normal tissues (Figure 2a), and the change rates of BRCA1/2 mRNA in BRCA were 9% and 6%, respectively (Figure 2b), and the AUC of BRCA1/2 was 0.766 and 0.830, respectively (Figure 3), using UALCAN, cBioPortal, and the TCGA database. The gene discussed is BRCA1; the disease is breast cancer.