CCR7 and B-cell chronic lymphocytic leukemia: Among 1299 genes differentially expressed between the proliferating (CXCR4dimCD5bright) and resting (CXCR4brightCD5dim) CLL compartments, CCR7 was not included.Immunophenotype of both fractions showed high levels of CCR7 expression although slightly greater levels were seen in proliferating cells in terms of percent positive cells and/or MFI.