CCR1 and carcinoma: It is a potent chemo-attractant for monocytes, macrophages, and MDSCs (White et al., 2013), while CCR1 ligation is implicated in progression of adenomas to carcinomas (Kitamura et al., 2007, Koizumi et al., 2007) and inflammatory lung pathologies (Kitamura et al., 2015).