Among the chemokine‐chemokine receptor axes enabling targeted migration of tumor cells to specific organ sites are CXCR4‐CXCL12,74 CCR7‐CCL21,75 CCR6‐CCL20,76 CXCR1 and CXCR2‐CXCL877 and others.72 The gene discussed is CXCL12; the disease is neoplasm.