GDF5 and breast cancer: Six genes (CXCL13, IL12RB2, CCL25, TNFRSF13C, TNFRSF8, and GDF5) were found in HPA database except IL21 and CCL7. The expression of CXCL13, IL12RB2, TNFRSF13C, TNFRSF8, and GDF5 in BC tissues were higher than normal tissues except CCL25 (Figure 7).