CXCL5 directly induces cancer cell proliferation and invasion and has been reported to be over-expressed in several cancer forms, including squamous cell cancer (Miyazaki et al., 2006; Wente et al., 2006; Park et al., 2007; Wong et al., 2007; Kuo et al., 2011). Here, CXCL5 is linked to squamous cell carcinoma.