When it comes to the expression of chemokine receptors, significantly higher absolute values of the CCR7+, CCR7+CD45RO+, CCR7+CD28+, and CXCR4+CCR5+ T-cell subpopulations were observed in the children cured of ALL than in healthy children (Table 6). This evidence concerns the gene CXCR4 and acute lymphoblastic leukemia.