CCR5 is expressed in various neoplastic cells including oral squamous cell carcinoma [27], murine renal cell carcinoma [20], chondrosarcoma [21], osteosarcoma [23], breast cancer [31–34], pancreatic cancer [35], salivary adenoid cystic carcinoma [36], and Hodgkin lymphoma [37]. This evidence concerns the gene CCR5 and breast cancer.