Meanwhile, LEP (P = 2.68E−14, adjusted P = 7.06E−10, logFC = − 3.12) and FGF2 (P = 2.84E-14, adjusted P = 7.48E−10, logFC = − 1.87) were the two most significant down-regulated gene in breast cancer tissues. This evidence concerns the gene FGF2 and breast carcinoma.