The mRNA expression level of PKMYT1 in the integrated breast cancer GPL570 microarray data and the paired TCGA-BRCA cohort was significantly higher in breast cancer than that in the corresponding normal breast tissue, and this result was also verified in the small sample qRT-PCR cohort from our hospital (Figures 1A–C, p < 0.0001). This evidence concerns the gene PKMYT1 and breast cancer.