C‐X‐C chemokine receptor type 7 (CXCR‐7) is a seven‐transmembrane G‐protein‐coupled receptor that is widely expressed in the haematopoietic system,9 cardiac microvessels, brain,10 kidney11 and several tumour cell lines.12, 13, 14. This evidence concerns the gene ACKR3 and neoplasm.