In the final article of the issue, “The role of chemokine receptor CXCR4 in the biologic behavior of human soft tissue sarcoma”, R. H. Kim et al., review the growing body of evidence that chemokine receptors, specifically CXCR4, play an important role in homing of sarcoma cells to lung and bones. The gene discussed is CXCR4; the disease is sarcoma.