To detect CCDC134 mRNA and protein expression in breast cancer, we analyzed CCDC134 expression data in TCGA and HPA.As shown in Figure 2A, unpaired data analysis showed that CCDC134 mRNA expression level in breast cancer tissues (n = 1109) was significantly higher than that in normal tissues (n = 113)(Figure 2A, 3.391±0.636 vs 3.005±0.618, The Mann - Whitney U - test, P < 0.001). Here, CCDC134 is linked to breast cancer.